... 螺纹导程lead 螺纹效率screw efficiency 螺旋传动power screw ...
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high efficiency ball-screw 高效率的滚珠丝杠
High efficiency semi hermetic screw 高能效半封闭螺杆式
screw conveying efficiency 螺旋输送效率
high-efficiency screw pump 高效螺杆泵
efficiency of screw 螺旋副效率
ideal efficiency screw propeller 螺旋桨理想效率
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