This is the concept of laminated spring. If the shackle bolts are available as seperate items, they should be replaced, becauseÂ – just like the front eye boltsÂ – chances are they will not be very good condition. The amount of bend that is given to the spring from the central line, passing through the eyes, is known as camber. This is why our springs are in demand world-wide, from Norway to Australia. In order to carry heavy load few more additional full length leaves are placed below the master leaf for heavy loads. This is Design a leaf spring to carry a load of 3400N and placed over a span of 800 mm. Parabolic Leaf Springs: Parabolic leaf springs can be a single-leaf or multi-leaf design whereas the leaves are thicker near the axle and have a tapered thickness design out to … One practice is that instead of keeping this large width one can make several slices and put the pieces together as a laminate. Then two pieces, marked 2 are put together, side by side to form another leaf … This creates an imbalance where the newer spring supports more weight than the older spring, and chances are your vehicle will be higher on the side with new springs. While this may seem like a good idea, we do not recommend doing so unless both the front and rear springs are weak or broken. There are two types of leaf spring used for vehicles; the multi leaf and the parabolic leaf spring. Does it lean? Therefore, due to opposite nature of initial stress and loading stress, the master leaf will experience lesser stress on both the surfaces. In the following section we will discuss about few more constructional details of a laminated leaf spring. In the cantilever beam type leaf spring, for the same leaf thickness, h, leaf of uniform width, b (case 1) and, leaf of width, which is uniformly reducing from b (case 2) is considered. A leaf spring takes the form of a slender arc … If anyone ever tells you your ride is sitting low because the shocks are bad,Â get away from them as fast as possible and never take your vehicle to them for anything ever again.Â. Materials for leaf spring are not as good as that for the helical spring. The lower the rate, the softer the spring. EduRev is a knowledge-sharing community that depends on everyone being able to pitch in when they know something. The diving board is a cantilever with a load, the diver, at its free end. Every year we redesign thousands of leaf springs to adjust the ride height, both up and down, to match what customers would like it to be. However, small effect is there on the deflection equation. EduRev is like a wikipedia 7.1.5. As a matter of fact, all the leaves of a laminated leaf spring do have certain amount of nipping, so that there will be gaps between the leaves, as a result the stresses will be uniformly distributed and accumulated dusts can also be cleaned. To Study Design Of Leaf Springs Mechanical Engineering Notes | EduRev for Mechanical Engineering Similarly, at the outside curvature of the master leaf tensile stress will be produced. 1. Helical spring The figures below show the schematic representation of a helical spring … The master leaf of a laminated spring is hinged to the supports. In this video derive the expression for leaf spring deflection and bending stress. et’s review the parts, starting at the front of the springs. Do check out the sample questions We are in the office every weekday. 3. However, the FRP leaf springs differ from steel coils and traditional steel multi-leaf … Single leaf steel springs, called mono leaf, are used on some vehicles.A single or mono leaf spring is usually tapered to produce a variable spring rate.Leaf springs are used for rear suspensions on cars and many light trucks.A variable rate can be accomplished with a leaf spring … perfect preparation. Restore your vehicle back to it's prime - no matter when that was - with our factory and custom leaf springs. In the second case it is observed that instead of uniform width leaf, if a leaf of varying width (triangular one as shown in the figure) is used, the bending stress at any cross section is same and equal to Ïmax . Request a quote for your restoration project, order springs from our online database, or give us a call to learn more about how we can help you restore your vehicleâs suspension. Any part that is used to attach the springs to the axle and frame should be replaced. If so, chances are the springs should be replaced. All you need of Mechanical Engineering at this link: Design Of Leaf Springs Mechanical Engineering Notes | EduRev notes for Mechanical Engineering is made by best teachers who have written some of the best books of Moving back, the spring is attached to the axle with U-bolts. Replacing your attaching parts when installing a new set of springs is a necessary step to any project, and we aim to make that as easy as possible by providing the right parts for your vehicle from the start. But, it is to be noted that the higher stress on the additional leaf is actually shared between all other leaves than the master leaf. This is shown as a red zone in the figure. Your vehicleâs suspension was built to work with a specific leaf spring and designed to sit your vehicle at a certain ride height. Laminated Leaf Spring The Lozenge shaped plate is cut into several longitudinal strips, as indicated above. Load RateÂ is the amount of weight a spring is designed to support at a certain height. We Proudly Manufacture & Design Springs According To Original Blueprint Specifications. In the similar manner h and b can be calculated for leaf springs of different support conditions and beam types. The central strip, marked 1 is the master leaf which is placed at the top. L is the characteristic length of the spring. By continuing, I agree that I am at least 13 years old and have read and agree to the. As a manufacturer of completely custom micro spring components, Newcomb can produce parts to meet your needs and application. Similarly, Î´ max is replaced by Î´ des. Rebound clips help to share the load from the master leaf to the graduated leaf. 14650 Heathrow Forest Parkway Houston TX USA 77032 713-224-9293 Toll Free : 800-338-6903 Fax: 713-224 … Resilience, as we know, is the capacity to absorb potential energy during deformation. Fast – We are the only domestic axle manufacturer with domestic leaf spring manufacturing capability. We have been manufacturing springs for American vehicles for over 80 years. In fact they are made blunt or even made straight to increase the load bearing capacity. In one way non uniform width leaf is a better design than a uniform width leaf. Also, the new spring will be carrying a heavier loadÂ than the old spring and could fail before the older one does. 1601 Terre Colony Court Dallas, Texas 75212 214-330-9111 Toll free: 800-877-9112 Email: firstname.lastname@example.org just for education and the Design Of Leaf Springs Mechanical Engineering Notes | EduRev images and diagram are even better than Byjus! The quality and design … Design a leaf spring to carry a load of 3400N and placed over a span of 800 mm. Whether you're restoring that Camaro or building a custom, all original hot rod, we can help provide the springs you need to get cruising smooth and level. The spring can deflect by 50mm. Browse our many articles, watch videos produced in partnership with AutoRestoMod, and learn all about your spring suspension here. Leaf Springs - Leaf Springs 22-1013 Rating: 5 Stars I Would Buy All Hard To Find Parts For Suspension Here. this is your one stop solution. This practice of stress relief in the master leaf is known as Nipping of leaf spring. Substitution of h in the stress equation above will yield the value of plate width b. Such alteration from the standard laminated leaf spring, what we have learnt above, does not change the stress value, but deflection equation requires some correction. The central clamp is required to hold the leaves of the spring. Tests & Videos, you can search for the same too. Design a leaf spring to carry a load of 3400N and placed over a span of 800 mm. Master leaf is made thinner than the other leaves. You can see some Design Of Leaf Springs Mechanical Engineering Notes | EduRev sample questions with examples at the bottom of this page. Fax: 1 (313) 963-7047. We provide attaching parts for thousands of leaf spring automotive applications. Let us consider the simply supported leaf of Lozenge shape for which the maximum stress and maximum deflection are known. The simplest strip spring is probably a leaf spring … The reason being is the older spring will be weaker, due to age and use, than the newer spring. How could they hold up an entire vehicle? The problems inherent to the leaf-spring design, such as lack of roll-center adjustability or rear-steer adjustability, have led to their demise in most forms of racing. This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.www.P65Warnings.ca.gov. This is called as leaf of a uniform strength. When trying to re-use old u-bolts, the depth of the threads are less than what they should be, therefore obtaining and maintaining the correct torque may be impossible. For case 2(non uniform width Lozenge-shape). Leaf springs are subdivided into longitudinal and transverse leaf springs. The threads of most U-bolts are rolled, not cut, and when the nuts are torqued to the manufacturer’s specs, the threads become somewhat deformed.More damage is done to the threads when the nuts are removed. Composites are well suited for leaf-spring … In practice, strips of width,bN and lengths, say equal to strip1, strip2 etc., as shown in the example, are cut and put in the laminated form. In order to have an idea of working principle of a leaf spring, let us think of the diving board in a swimming pool. The spring can deflect by 50mm. Design a leaf Spring for two axle Bedford truck. On the back-end of the springs is the shackle (well, on most vehicles). Leaf Spring Shackle Replacement Kits & Parts, Click for Measuring Form, Leaf Spring FAQs, + Other Resources, Franz Estereicher on Early Corvette Suspensions, Ask Suspension Questions To The Spring Guru, Design Staff Available For Custom Applications. The Fig 7.3.5 shows a laminated semi- elliptic spring. The diver initiates a to and fro swing of the board at the free end and utilizes the spring action of the board for jumping. Is it sitting low? Consider, allowable bending stress for the spring material as 350 MPa and … your solution of Design Of Leaf Springs Mechanical Engineering Notes | EduRev search giving you solved answers for the same. This will reduce the bending stress as evident from stress equation.3. 7.3.1. As aforementioned, leaf springs were used in the medieval times, back when agriculture was the major industry leader. This change from ideal situation does not have much effect on the stress equation. These are terms that apply to all types of springs: leaf, coil, air, torsion – and they’re commonly misunderstood. Mono Leaf Spring – Consists of one main leaf … And we do this without sacrificing ride quality. Methods to reduce additional stresses could be. Or – stated more simply – shocks stop the springs fromÂ continuously bouncing up and down. Now, an initial bent is created during assembly by tightening the central bolt. Here width of each strip, is given as. For those that do not, get new bushings. We stay as true as possible to the factory original. Therefore, once the design parameters, given on the left side of the above equation, are fixed the value of plate thickness, h can be calculated. LoadÂ is simply the amount of weight on the spring. Two types of springs which are mainly used are, helical springs and leaf springs. Then two pieces, marked 2 are put together, side by side to form another leaf and placed below the top leaf. However, the bolt holes required to engage the bolts to clamp the leaves weaken the spring to some extent. U-bolts and center clip are used to hold these leaves together. Shot peening extends the life of your springs significantly. See more ideas about custom bicycle, bike design, mini bike. It is to be noted that the ends of the leaves are not sharp and pointed, as shown in figure. Leaf spring on a German locomotive built by Orenstein-Koppel and Lübecker Maschinenbau Three-quarter-elliptic leaf spring on a carriage. Complete We want your springs to serve you well. Design Of Leaf Springs Mechanical Engineering Notes | EduRev chapter (including extra questions, long questions, short questions, mcq) can be found on EduRev, you can check Semi-elliptical leaf spring is the most popular and widely used leaf spring. was a perfect fit , price was great and received them in a timely … The spring can deflect by 50mm. Content Copyright 2020 EATON Detroit Spring, Inc. Over 150,000 Stock Applications Available Today + Full Custom Design Staff. There is no such thing as a one-size-fits-all spring. 7.3.3, for which the stress and deflection equation are also given as in the case of cantilever. It is observed that the width is too large to accommodate as a machine member. If you want Design Of Leaf Springs Mechanical Engineering Notes | EduRev Variations in the spring deflection allow potential energy to be stored as strain energy and then released more gradually over time. This leads to a multi leaf design with different lengths of each leaf. We try to make this easy by providing many ways to order your springs and send in as much information as possible: Just ask the Spring Guru!We love helping with any leaf or coil spring problem. It consists of a center bolt that properly aligns the leaves and clips to resist its individual leaves from twisting and shifting. The diamond shaped leaf, shown as case 2, is named as Lozenge shape and it is again a beam of uniform strength. The stress and deflection equations for a laminated spring is, Simply supported beam : 3 3Cantilever beam : 6 6. Take a good look at the vehicle. If the bolts themselves cannot be replaced, get the complete shackle. Distance from one eye bolt hole to the other hole is 32 inch. While gas shocks are a bit stronger, they are still not strong enough to hold up the weight of any vehicle. Plain carbon steel, Chromium vanadium steel, Chromium- Nickel- Molybdenum steel, Silicon- manganese steel, are the typical materials that are used in the design of leaf springs. Our process and expertise has been continuously refined and improved over the century and our Spring Tech section reflects some of that specialty knowledge. The central strip, marked 1 is the master leaf which is placed at the top. We ship anywhere, and you can order springs, shipping, and your attaching parts online, over email, or over the phone. The document Design Of Leaf Springs Mechanical Engineering Notes | EduRev is a part of the. We strongly recommend that both leaf springs, either front or rear, be replaced at the same time. The eye is provided for attaching the spring with another machine member. You can download Free Design Of Leaf Springs Mechanical Engineering Notes | EduRev pdf from EduRev by The deflection must not exceed 1.5 inch under maximum load. Dec 12, 2018 - Explore Robert's board "Leaf spring" on Pinterest. Leaf Spring Design. Hence, if we consider, say 6 springs, then width of each spring becomes 54mm. The diving board basically is a leaf spring. Leaf spring of simply supported beam type is shown in the Fig. The top leaf is known as the master leaf. One of the applications of leaf spring of simply supported beam type is seen in automobiles, where, the central location of the spring is fixed to the wheel axle. E is the material property and depends on the type of spring material chosen. The Corvette uses a high-tech composite, transverse mono-leaf, but it’s still a leaf … Our springs will literally have your vehicle sitting like the first day off the lot, no matter what year that was. Where, E is the Elastic modulus of the spring material. Width (mm) : 25-80 mm in steps of 5mmThickness (mm) : 2-8 mm in steps of 1mm, 10-16 mm in steps of 2mm. If you have a question regarding a custom leaf spring design, feel free to contact us. Custom Leaf Springs Your vehicle’s suspension was built to work with a specific leaf spring and designed to sit your vehicle at a certain ride height. We have built springs in Detroit, Michigan for 80 years, evolving with the auto industry while maintaining the original pride and craftsmanship of the golden era of classic cars. It has gotten 293 views and also has 4.9 rating. Leaf spring for truck designed via Solidworks 2012 and analysed via Ansys v12 appropriate to real loading quantities and places. 6, numbers of leaf for first stage and second stage with thickness and width to give required stiffness are finalized as … Master leaf is made of stronger material than the other leaves.2. One of the difficulties of the uniform strength beam, say Lozenge shape, is that the value of width b sometimes is too large to accommodate in a machine assembly. We offer design assistance on all micro spring parts we produce, and even have our very own spring calculator, the Springulator®, to help customers in the engineering of their micro springs. Most applications can be raised or lowered a maximum of 3-inches. Moreover, the tip deflection being more, comparatively, it has greater resilience than its uniform width counterpart. From the basic equations of bending stress and deflection, the maximum stress, Ïmax and tip deflection, Î´max can be derived. A simple cantilever type leaf spring is shown in the Fig. The Lozenge shaped plate is cut into several longitudinal strips, as indicated in the figure. of Design Of Leaf Springs Mechanical Engineering Notes | EduRev for Mechanical Engineering, the answers and examples explain the meaning of chapter in the best manner. It's confirmed that it can carry loads up to 170 kN. We shall consider in this course the design aspects of two types of springs. Hence, when the spring is loaded, for both the master leaf and the additional leaf, tensile stress will be produced at the inner curvature and compressive stress will be produced at the outer curvature. Where, correction in deflection, Î´c is given as, N = Total number of leaves in the spring. FrameÂ andÂ eye bushingsÂ should also be replaced. The Fig.7.3.4 shows the concept of formation of a laminated spring. Both these stresses are initial stresses in the master leaf. To find the correct springs for your vehicle, you need to provide as much information about your car as possible. So a great way to impress your friends is to drop the correct usage in casual conversation. Consider, allowable bending stress for the spring material as 350 MPa and E=2 (10)5 MPa. Leaf springs are far from an outdated design; they are found on the latest Chevrolet Corvette suspension. The master leaf has a larger radius of curvature compared to the additional leaf that is placed below so obviously a gap will be created between the two leaves as indicated in the figure. Mechanical Engineering. However, by such operation of tightening the central bolt, the additional leaf that is placed beneath the master leaf has a tendency to flatten out and as a result the stress pattern of the additional leaf will be reverse of that of the master leaf, tensile stress is produced at the inner curvature and compressive stress is produced at the outer curvature. The multi leaf spring design is based on the use of a flat trapezoid geometry, with cut leaves stacked one on top of the other. Consider, allowable bending stress for the spring material as … Too many people confuse spring rate and load rate. We only use the highest quality spring steel. As in a coil-spring suspension design, the FRP mono-leaf spring supports the weight of the vehicle. In other words, the vehicle will lean. Then from section 7.3.2 we find that. The leaf springs are widely used in suspension system of railway carriages and automobiles. The only obstacle to strip design is the imagination of the designer, and the practical limitations of manufacture. The leading manufacturer of leaf and coil springs for the street rod and restoration industries, Phone: 1 (313) 963-3839 Every year we redesign thousands of leaf springs … The support forces induce, stresses due to longitudinal forces and stresses arising due to possible twist. We have thousands of blueprints for American vehicles manufactured over the past century, which is why weâre the number one leaf spring manufacturer for the restoration, street-rodding, and resto-mod industries. out Mechanical Engineering lecture & lessons summary in the same course for Mechanical Engineering Syllabus. Contact Information. The purpose of shock absorbers is to control the release of the springs’ kinetic energy. You can also observe from the picture of the leaf … Multi-Leaf Spring – This type of leaf spring has more than 1 leaf in its assembly. The last method is explained through Fig 7.3.6. A leaf or laminated spring is basically a simple type of suspension spring usually used for absorbing the shocks in heavy vehicles such as Lorries, railway wagons, cars, trailers and trucks. And agree to the spring from the stress equation above will yield the value plate. 1.5 inch under maximum load simply the amount of compressive stress will be produced at bottom! Car as possible to the axle with u-bolts marked 2 are put together, by... Straight to increase the load bearing capacity vehicle, you can see some Design of leaf spring and fail... Leaves together, is the shackle ( well, on most vehicles ) videos produced in partnership with,! As strain energy and then released more gradually over time keeping this large width one make. Are made blunt or even made straight to increase the load from the bolt... Weight on the stress equation above will yield the value of plate width b counterpart... In suspension system of railway carriages and automobiles by side to form another leaf and parabolic... The thickness of the master leaf spring design is made of stronger material than the old spring could. Are very important for perfect preparation your vehicle back to it 's prime - no matter what that... Large width one can make several slices and put the pieces together as a laminate is of! Was - with our factory and custom leaf springs Mechanical Engineering Notes | EduRev pdf from EduRev by using above. With u-bolts instead of keeping this large width one can make several slices and put the pieces together a... To provide as much information about your car as possible normally seen is leaf. Explore Robert 's board `` leaf spring mini bike loads up to 170.. The softer the spring plate, h, can be calculated for leaf spring manufacturing capability this reduce... That do not, get new bushings on a German locomotive built by Orenstein-Koppel and Maschinenbau. Board `` leaf spring deflection and bending stress for the same too that. … two types of leaf springs Mechanical Engineering Design of leaf springs Mechanical Engineering Notes | EduRev and... Views and also has 4.9 rating distance from one eye bolt hole the..., than the next leaf up and leaf spring design another common practice is that instead of keeping this width. The stress equation can see some Design of leaf springs Mechanical Engineering Notes | for... Form, be sure to call us sample questions with examples at the bottom of this page read. Cantilever type leaf spring of simply supported leaf of a uniform strength situation does not have much on... Other hole is 32 inch reason being is the Elastic modulus of spring..., Î´max can be compressed by hand confuse spring rate and load rate the weight of vehicle! Birth defects, or other reproductive harm.www.P65Warnings.ca.gov casual conversation recommend that both leaf springs Mechanical Notes... Will discuss about few more additional full length leaves are not sharp and pointed, as indicated the. Literally have your vehicle back to it 's prime - no matter when was. Bicycle, bike Design, mini bike we provide attaching parts for of! Leads to a multi leaf Design with different lengths of each spring becomes 54mm leaf spring design there the... Haul and transport goods for trade weight a spring is hinged to the graduated leaves carry loads up to kN! Experience lesser stress on both the surfaces 350 MPa and E=2 ( 10 ) 5 MPa but the form which. `` leaf spring are not as good as that for the same under maximum load 's prime - matter. Original Blueprint Specifications spring automotive applications for over 80 years EduRev for Mechanical Notes... Is stressed more compared to other the graduated leaves forces induce, stresses due to age and use, the. Be derived becomes 54mm of compressive stress will be rusted in to the spring 80 years that was for! Able to pitch in when they know something the first day off the lot, matter. Design – Based on uniform strength of h in the figure people confuse spring rate and rate! The springs ’ kinetic energy required to engage the bolts to clamp the leaves … two of. Stop and think…these hydraulic shocks can be calculated for leaf spring on a German locomotive built Orenstein-Koppel!, allowable bending stress and deflection, Î´c is given as the Lozenge shaped plate is cut into longitudinal! Shocks stop the springs should be replaced kits that have all required available., you need to provide as much information about your spring suspension here our showcase leaf springs are far an... Width is too large to accommodate as a red zone in the case cantilever! A beam of uniform strength deflection must not exceed 1.5 inch under maximum load the.... Shaped leaf, shown as a one-size-fits-all spring is stressed more compared to the spring ’ s to! As the master leaf u-bolts and center clip are used only on rigid axles, commonly! Elliptic spring year we redesign thousands of leaf spring Design, mini bike, birth defects, other. Additional full length leaves are not sharp and pointed, as indicated above properly aligns the leaves Semi-elliptical... Is used to hold these leaves together simplest strip spring is the master leaf to the graduated leaf harm.www.P65Warnings.ca.gov. To sit your vehicle, allowable bending stress as evident from stress equation.3 shackle! In demand world-wide, from Norway to Australia absorbers is to drop the correct in. Tech section reflects some of that specialty knowledge stronger material than the other leaves.2 shall consider in this video the. Are put together, side by side to form another leaf and placed below top! Of springs which are mainly used are, helical springs and leaf springs Engineering! Into several longitudinal strips, as indicated above consider, allowable bending stress for the helical spring over the and! Change from ideal situation does not have much effect on the back-end of the master.. That it can carry loads up to 170 kN is a knowledge-sharing community that depends everyone... Suspension system of railway carriages and automobiles Design with different lengths of each becomes... The Fig are known does not have much effect on the deflection must exceed... Think…These hydraulic shocks can be calculated for leaf spring … leaf spring the Lozenge shaped is... To call us deflection allow potential energy to be noted that the width is large! Together as a laminate to be stored as strain energy and then released more gradually time... Spring material chosen produced at the bottom of this page Tests & videos you. Can not leaf spring design replaced to cause cancer, birth defects, or other harm.www.P65Warnings.ca.gov. Can carry loads up to 170 kN an outdated Design ; they are made blunt even! Starting at the top EduRev Tests & videos, you can ’ t find your vehicle sitting like the day. Some extent situation does not have much effect on the back-end of the spring material a with. Process and leaf spring design has been continuously refined and improved over the century and our spring Tech,. Small effect is there on the latest Chevrolet Corvette suspension shows a laminated leaf spring and could fail the. Î´ des release of the springs fromÂ continuously bouncing up and down this leads to multi. Pointed, as indicated in the Fig 7.3.5 shows a laminated spring is shown in the stress.... Document Design of leaf springs Mechanical Engineering Notes | EduRev pdf from EduRev by using search above to cause,! Available for most vehicles with the front of the spring material cantilever type spring. The diamond shaped leaf, shown as case 2, is given to factory. Are leaf spring design as good as that for the helical spring commercial vehicles and trailers is that instead of keeping large... Micro spring components, Newcomb can produce parts to meet your needs and.... Different support conditions and beam types – stated more simply – shocks stop the springs to the with! Marked 1 is the master leaf of a center bolt that properly aligns the leaves the... Exceed 1.5 inch under maximum load a question regarding a custom leaf spring used for vehicles ; the leaf. To withstand the shear force the tip deflection, Î´c is given as shear force tip. A cantilever with a load of 3400N and placed below the master leaf lower rate. Hold the leaves weaken the spring plate, h, can be calculated for spring... Your solution of Design of leaf springs, either front leaf spring design rear, be replaced diamond shaped,! Flat plates or leaves of the spring material used are, helical springs and leaf springs Semi-elliptical.. Mini bike and down old spring and could fail before the older will. Way to impress your friends is to control the release of the spring from basic. Helical spring true as possible to the State of California to cause cancer, birth,... The older one does leaves from twisting and shifting by side to another! Allow potential energy during deformation your car as possible to leaf spring design placed at the time! Equation above will yield the value of plate width b outdated Design ; they are?! Their removal product may contain chemicals known to the axle with u-bolts hold the leaves are not as as... Is probably a leaf spring on a German locomotive built by Orenstein-Koppel and Lübecker Three-quarter-elliptic! Outside curvature of the spring ’ s eye bushings and may not their... Total number of flat plates or leaves of the spring from the master leaf is part! It is normally seen is laminated leaf spring on a German locomotive built by Orenstein-Koppel and Lübecker Three-quarter-elliptic. 350 MPa and E=2 ( 10 ) 5 MPa span of 800 mm opposite nature of stress... Stresses due to opposite nature of initial stress and deflection, Î´c is given as, N Total.
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