hand-operated valve
常见例句
- There are different kinds of valves ranging from simple hand operated valve to fully automatic valve for control of gas-air mixture.
有很多從簡單的手閥等各種閥到全自動控制天然氣混空氣閥。
www.tech-domain.com - 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.
牐閥的開啓和關閉靠手動泵來實現，取代了過去手搖絲杠的笨重牐閥。
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