Featuring a spring piston firing mechanism, the sniper rifle is almost silent when fired.

采用弹簧活塞式发射装置，狙击步枪射击时几乎无声。

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The structure and working mechanism on the new type of spring-piston pressure auto-balancing device with condenser was introduced.

介绍了作者自行设计的带冷凝器新型弹簧活塞式压力自平衡装置结构及其工作原理。

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Diffrient was a frustrated industrial designer with pioneering achievements, including the first chair whose height could be adjusted via a gas piston and spring, and a fold-up office table that replaced screws and plates with simple interlocking hinges.

FORBES: The Chair Men