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1·Should it have a long or short piston?

活塞应该长还是短？

2·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。

3·The final step came when steam was introduced into the cylinder to drive the piston backward as well as forward, thereby increasing the speed of the engine and cutting its fuel consumption.

最后一步是将蒸汽引入气缸，使得活塞前后推动，从而提高了发动机的速度，降低了燃料消耗。

4·The piston moves by steam pressure.

活塞在蒸汽压力下运动。《新英汉大辞典》

5·There's my piston right there.

现在我的活塞在这里。

6·Remove tool from rack piston.

从齿条活塞上拆下工具。

7·We've got my container, my piston here.

这里是容器和活塞。

8·So my container here has a piston on it.

我的容器上有一个活塞。

9·The piston is reciprocating inside cylinder.

活塞在汽缸内部往复运动。

10·This piston should be properly centered.

这个活塞应很好的对中。

(1)piston ring[机]活塞环

(1)piston pump活塞泵

(1)piston rodn. 活塞杆

(1)piston pin活塞销

(1)piston compressor活塞式压缩机；往复式压缩机

(1)engine piston发动机活塞