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Suspension system is the vehicle frame and the bridge or wheel between ali the trans­missions of force connection device. lts function is to transfer the force and torque between the wheels and the frame, and buffer the impact force from uneven road surface to the írame or body, and attenuate the vibration caused thereby, so as to ensure the smooth running of the car. Suspension system Is the vehicte frame and the bridge or wheel between att the transmissions oí force connection device. lts function is to transfer the force and Iorque between the wheels and the frame, and buffer the impact force from uneven road surface to the frame or body, and attenuate the vibra­tion caused thereby, so as to ensure the smooth running of the car.