Headvalve
[机] 头阀
🗣️ 情景例句
Who's the patient?
病人是谁？
Did you clean this yourself?
你自己亲自清理这个？
The man had connected the air-line to a supply line of oxygen, not compressed air.
这个工人把供气管接到了氧气供应管上，而不是接到压缩空气管上。