air pump
气泵
排气唧筒
活塞泵
空气帮浦
抽气泵
空气泵
抽气机
抽风机
Sensible Heat driven Air Pump
water source heat pump air conditioning
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