emergency gate
... emergency gallery 非常出口坑道 emergency gate 应急闸门 emergency generator 紧急发电机；后备发电机 ...
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应急备用闸门 safety lock gate
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上部总闸门用于日常运行，而下部总闸门用于在正常使用的闸门发生渗漏并需要更换的情况下提供备用或应急的功能。
The upper master valve is used on a routine basis, with the lower master valve providing backup or contingency function in the event that the normal service valve is leaking and needs replacement.
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