... 楔式闸阀：wedge gate valve 平行式闸阀：parallel gate valve 垂直板式蝶阀：vertical disc type butterfly valve ...
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parallel single disk gate valve 单阀碟双面平行密封闸阀
parallel slide gate valve 平行滑动闸阀
parallel disc type gate valve 平行闸板式闸阀
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