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Shock absorber

A shock absorber is a mechanical support designed to smooth out a sudden shock impulse and dissipate kinetic energy over an extended period of time. There are several commonly-used approaches to shock absorption:

Pneumatic and hydraulic shock absorbers commonly take the form of a cylinder with a sliding piston inside. Spring-based shock absorbers commonly use helical springs[?] or leaf springs[?], though coil springs[?] can be used to absorb torsional shocks as well.

Shock absorbers are an important part of automobile suspensions, aircraft landing gear[?], and the supports for many industrial machines. Large shock absorbers have also been used in architecture to reduce the susceptibility of structures to earthquake damage.

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