... shutoff gate 截止门 shutoff gate valve 截止阀 shut off head 全闭压头(风机或泵)，关闭压头(泵或风机在输出量为零时的压头) ...
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gate-type shutoff valve 闸门式截止阀
The Bi-Directional Knife Gate Valve provides bubble tight shutoff in both directions up to full rating of the valve.
这种双向刀闸阀在阀门压力等级下，任何方向均可实现气泡级密封关闭功能。
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