Damper applied to mahjong machine
The damper is a device that provides resistance to movement and consumes movement energy. Using damping to absorb energy and shock absorption is not a new technology. Various dampers (or shock absorbers) have been used in aerospace, aviation, military, guns, automobiles and other industries to reduce vibration and energy. Since the 1970 s, people have gradually transferred these technologies to buildings, bridges, railways and other structural projects, and their development is very rapid. In particular, the hydraulic viscous damper with a history of more than 50 years has undergone a large number of experiments, rigorous review, and repeated demonstrations before it was accepted by the structural engineering community in the United States, especially the long process of seismic testing.
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