air circulation空氣環流air column空氣柱air compre or空氣壓縮機air conde er空氣電容器air conveying氣齡送air coolant空氣冷卻劑air cooling空氣冷卻air coordinates空間坐標air current氣流air cushion氣墊air cylinder壓氣缸air damper空氣阻尼器air damping空氣阻尼air de ity空氣密度air drag空氣阻力air duct風道air eddy空氣渦旋air flow氣流空氣量air flow meter氣療air friction空氣摩擦air gap空隙air gas風煤氣air hammer空氣錘air hardening空氣淬火air hoist風動起重滑車air humidity空氣濕度air inflating充氣air injection diesel engine空氣噴射柴油發動機air inrush空氣侵進air intake valve進氣閥air jet空氣噴射air pipe氣管air plasma空氣等離子體air pre ure gage空氣壓力計