... motor pump ==> 密封电动泵,密封式电动泵,屏蔽泵 canned motor pump with inner recirculation pump ==> 内循环形屏蔽泵 canned motor pump with outer recirculation pump ==> 外循环形屏蔽泵 ..
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内循环形屏蔽泵联轴器 canned motor pump coupling with inner recirculation pump coupling
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