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）。
The driver moves the piston inside the cylinder, alternately pulling in and pushing out the process fluid (Fig. ).
在汽车工业上活塞环镀锡和汽缸壁镀锡可防止滞死和拉伤。
In the automobile industry piston ring tin and cylinder walls tin can prevent sluggish death and injury.
汽缸内，活塞及杆迅速走高推入一个较小的汽油和航空航天凡符合火花塞。
Inside the cylinder, a piston and rod quickly move up to push the gasoline and air into a smaller space where it meets the spark plug.
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