短語詞組短語draft t fan 抽風機Induced -Draft-Fan 引風機Forced -Draft-Fan 強制通風機FDF Forced -Draft-Fan 強制通風機controlled blade of forced -draft-fan 風機動調(diào)exhauster draft fan 排氣器通風風扇power of draft fan 引風機功率forced d draft fan 強制通風風扇;鼓風機induced d draft fan 引風機;排氣式通風機 返回 draft fan