Manual Operated Valve for Hyper-Cryogenic 超低温手动长轴阀
manual operated directional valve [油气] 人控换向阀
manual-operated covering valve 手动遮断阀
manual-operated valve
手动安装阀门
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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