The piston is reciprocating inside cylinder.

活塞在汽缸内部往复运动。

She bit ah, throw ah, shine, reciprocating fly, never stop.

她衔呀，扔呀，成年累月，往复飞翔，从不停息。

Warning - Do Not Use For Reciprocating Air Compressor Service.

警告：不要用在往复式空气压缩机管线上。

Reciprocating compressors are prone to wear and tear during operation.

往复式压缩机在运行中容易磨损和断裂。

The crankshaft serves to change the reciprocating power into rotary power.

曲轴的作用是把往返力变为旋转动力。