The driver moves the piston inside the cylinder, alternately pulling in and pushing out the process fluid (Fig. ).

原动机驱动在汽缸内的活塞，交替地吸入和排出工艺流体（图）。

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A striking piston (3) is connected to a driver bit (4).

在打击活塞(3)上结合螺丝批头(4)。

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A striking piston (3) is connected to a driver bit (4).

在打击活塞(3)上结合螺丝批头(4)。

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