duplex steam pump
... 单杠蒸汽直动泵: simplex steam pump 双缸蒸汽直动泵: duplex steam pump 双缸串联蒸汽直动泵: duplex compound steam pump ...
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双缸蒸汽直动泵联轴器 duplex steam pump coupling
双缸串联蒸汽直动泵 duplex compound steam pump
双缸往复蒸汽直动泵 Worthington pump
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