短語詞組短語air motor shaft 氣動馬達軸air r shaft 通風井;風井hot air exhaust shaft 排熱風井mine air return shaft 回風立井air return shaft 回風井筒air relief shaft 排氣豎風筒;通風豎井air inlet shaft 進氣道Air draught shaft 自然送風口air hovered shaft 氣浮軸承 返回 air shaft