... conversion valve 转换阀;转向阀 column switching valve 柱转换阀 common slide valve 普通滑阀 ...
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column switchellong valve
... column shut-off valve柱关闭阀 column switchellong valve柱转换阀 column valve柱阀 ...
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短语
斗杆转换阀柱塞
stick crossover valve spool
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