短语词组短語exhaust fan main shaft 風機主軸fan efficiency shaft gear 風扇軸敺動齒輪fan main shaft 風機主軸fan n shaft 通風井fan efficiency shaft 扇風機井fan turbine shaft 風扇渦輪軸fan cardan shaft 風扇萬曏軸Heung Fan Liu Shaft 香粉寮竪井fan maim shaft 風機主軸 返回 fan shaft