双凹顶活塞
... recessed pointing 凹灰缝,凹槽勾缝... recessed piston 双凹顶活塞 single recessed wheel 单面槽砂轮 ...
这些腔室部分由具有近端和远端以及近端凹陷段和远端凹陷段的活塞限定而成。
The rings have joints (they are split) so that they can be expanded and slipped over the piston head and into the recessed grooves cut in the piston.活塞环有接口(也就是有一缝隙),这样可以使端部扩张并滑入活塞上的凹槽中。