... quick opening valve 快开阀门 quick-opening gate valve 速启阀门 standby valve 应急阀门; 备用阀门 ...
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quick-opening gate valve 速启阀门
opening of gate valve 闸阀开度
opening gate valve
开启闸阀
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The opening and the closing of the gate valve are realized by a manual pump; the past bulky gate valve with a hand-operated screw rod is replaced.
闸阀的开启和关闭靠手动泵来实现，取代了过去手摇丝杠的笨重闸阀。
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