air lock
空气闭锁
气闸
气塞
气障
气锁阀
阻隔室
气锁
气穴
锁风
气穴气塞冷藏船的管理间
policy of prevention in the first place and integrating prevention with control
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
variable air volume (VAV) air conditioning system
variable air volume air conditioning system
a device design for prevention
abortion prevention agents
abrasion prevention measure