air locking meaning in English

密封材料
气密材料

Tunnelling machines - air locks - safety requirements
隧道掘进机.气闸.安全要求
Tunnelling machines - air locks - safety requirements
隧道掘进机械.气闸.安全性要求
Air regulation systems in mining - air locks - building and operation
空气调节系统.空气阀门.结构和操作
Tunnelling machines - air locks - safety requirements ; german version en 12110 : 2002
隧道机械.气闸.安全性要求
Power assisted air gates - travel - way air locks - type doors with pressure
动力辅助作动的空气门.行车道空气锁.压力门

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