four-cylinder triple-expansion engine 四缸三胀式发动机 ; 四缸三胀式蒸汽机
triple valve cylinder cap 三通阀盖
triple-acting actuating cylinder 三作用动作筒
triple-functional long-stroke cylinder 三功能长油缸
·2,447,543篇论文数据，部分数据来源于NoteExpress
The structure of the derrick is triple-section telescoping structure, substructure is parallelogram structure, can be lifted by hydraulic cylinder.
井架采用三节伸缩式结构，底座采用平行四边形结构，能用液缸整体起升。
youdao
应用推荐
模块上移
模块下移
不移动