hand-operated valve
常見(jiàn)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(jiǎn)單的手閥等各種閥到全自動(dòng)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.
閘閥的開(kāi)啟和關(guān)閉靠手動(dòng)泵來(lái)實(shí)現(xiàn)，取代了過(guò)去手搖絲杠的笨重閘閥。
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