... 螺旋叶片式流量计 spiral vane flowmeter 螺旋叶片式输送器 helically bladed screw conveyer; helically-bladed screw conveyer; helically-bladed screw conveyor 螺旋桨式叶轮 propeller-type impeller ...
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helically bladed screw conveyer 螺旋叶片式输送器
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