- ball type torpedo
- 球形: sphere; sphericity; spherica ...
- 螺杆: screw; spiral; screw arbor; ...
- 头: 5点就得动身 have to start before ...
- 方形螺杆泵: screw pumwith square thread; screw vane pump
- 矩形螺杆泵: square thread screw pump
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球形螺杆头的英文
发音:
- ball type torpedo
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