air tight pressure test
air-tight
气密
密封的
不透空气的
气密的
不漏气的
气密的@a.不透气的
不透气
Air Leakage Rate of Air Preheater
air to air heat recovery unit
air to air missile launching envelope
arctic air [= arctic air mass]
continental air [= continental air mass]
main air port exhaust air
marine air [= marine air mass