... non-clog(-ging)pump不淤塞泵; non-hermetic screw pump非密闭式螺杆泵; nontacting sealed selfprimingpump无接触密封自吸泵; ...
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... 严密封闭电念头 closing motor 非严密封闭式螺杆泵 non-hermetic screw pump 严密封闭形燃油阀 closed-type fuel valve ...
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non-hermetic screw pump coupling 非密闭式螺杆泵联轴器
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