活塞

huó sāi gǎn

活塞杆

piston rod

huó sāi quān

活塞圈

piston ring

huó sāi duì kōng qì de yā suō

活塞对空气的压缩

the compression of air by the piston

fā dòng jī nèi huó sāi de bù jú

发动机内活塞的布局

the configuration of pistons in an engine

lián gǎn xiǎo tóu lián jiē zhe huó sāi xiāo

连杆小头连接着活塞销。

The connecting rod little end is connected to the piston pin.