?双凸轮旋转泵

... three-lobe oil pump 三叶齿轮油泵 two-lobe rotary pump 双凸轮旋转泵 twin lobe pump 双凸轮旋转活塞泵 ; 双凸轮扭转活塞泵 ...

?双凸轮扭转泵

... two-lobe rotary pump: 双凸轮旋转泵 two-lobe rotary pump: 双凸轮扭转泵 tri-lobe timed rotary gear pump: 三叶同步旋转齿轮泵 ...