锅炉烟道 boiler flue ; boiler pass ; The flue of boiler

炉道、烟道 combustion flue

壁炉烟道口翼墙 chimney wing

双烟道锅炉 double-pass boiler ; double-flue boiler

单烟道锅炉 single pass boiler

炉底烟道 sole flue

三烟道锅炉 triple-pass boiler

炉内连接烟道 interconnecting ductwork

回降烟道式锅炉 drop flue boiler