暗杆闸阀 inside screw non-rising stem type gate valve 楔式闸阀 wedge gate valve ..
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...做升降运动的阀门 流阻小,启闭力小,开启时间长 按阀杆分:明杆闸阀(outside screw-and-yoke: OS&Y) 暗杆闸阀(non rising stem: NRS) 按闸板分:平板闸阀parallel gate(单平板single gate、双平板double-disc parallel gate) 楔式闸阀wedge gate(单闸板on...
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... 安全阀 Safety valve 暗杆闸阀 Inside screw nonrising stem type gate valve 百叶窗;闸板 shutter ...
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