普通管省煤器 economizer tube: 節熱管; 省煤器管coil tube type economizer: 盤管式經濟器economizer fin-tube: 節熱器凸片管economizer tube cleaner: 省煤器清管器fin tube economizer: 翼式省煤器下載手機詞典可隨時隨地查詞查翻譯