The cylinder drives a piston extraction and play materials, and by the one-way valve to control the flow of materials, the magnetic switch control cylinder stroke, which adjust the filling volume.

通过气缸带动一个活塞抽取和打出物料，并由单向阀控制物料流向，由磁环开关控制气缸行程，即调节灌装量。

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Camshafts play an important part in the valve train of engine, their accuracy of finish can affect the unitary performance of engine.

凸轮轴是汽车发动机配气机构的一个非常重要的机械部件，它的加工精度直接影响到汽车发动机的整体性能。

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Valve is eschewing the sort of dramatic overture popular in the tech world, preferring instead to play a game of inches.

FORBES: Valve Could Be Moving Hardware into Beta Sooner Than You Thought