... 双流道叶轮泵 double channel impeller pump 双螺杆泵 two screw pump 双曲线式罗杆泵 hyperbolic screw pump ...
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two-screw pump 双螺杆泵
two screw pump coupling 双螺杆泵联轴器
submersible two-screw pump 潜油双螺杆泵
two-screw w pump 双螺杆泵
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