- cavitycavity 口腔
cylindrical cavity 筒形腔；圆柱形谐振腔
progressive cavity pump 螺杆泵；螺杆抽油泵
uterine cavity 子宫腔
cavity
- progressive螺杆泵；螺杆抽油泵
progressive forces 进步力量
progressive tax 累进税
progressive movement 进步运动；渐进运动
progressive
- pump真空泵
pump station 泵站
screw pump 螺旋泵，螺杆泵
hydraulic pump 液压泵，水力泵
gear pump 齿轮泵
submersible pump 潜水
- screwscrew 双螺旋桨；双推进器；双驱动桥
screw pump 螺旋泵，螺杆泵
screw thread n. 螺纹
ball screw 滚珠螺杆；滚珠丝杆；球头螺钉
screw
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