air to air heat recovery unit
air to air missile launching envelope
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
air to surface area ratio
air to water heat exchanger
air to water system
空气-水调节系统
空气-水第系统
机组资源管理(CRM)
entrain air to reduce cavitation damage
Exposure to air pollution