side pot type piston pump
... 球、球芯ball 分置阀室式活塞泵(美)side pot type piston pump 蝶阀;瓣阀butterfly valve ...
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separate valve box type piston pump
... 分段式多级泵 stage chamber pump 分置阀室式活塞泵 separate valve box type piston pump 分置阀室式活塞泵（美） side pot type piston pump ...
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