那连接竿送活塞的上上下下运动到机桥，将它换成旋转的运动。

The connecting rod transmits the up-and-down motion of the piston to the crankshaft, which changes it into rotary motion .

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桥梁施工中为减少泥浆对桥位处的环境污染，尽量采用旋转钻机干法成孔。

In order to avoid the pollution caused by slurry around bridge-building sites, they use dry-boring by rotary drills where possible.

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无刷交流励磁机为旋转电枢式的同步发电机，旋转整流器为模块式的三相整流桥。

AC brushless synchronous excitation generator is a rotating-armature synchronous generator, which has a module of three-phase rectification bridge.

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