... boiler manufacture,convenient,simple, lowest prive, high quality LSG 0.05-0.4 Coal-fired Boiler with an international classic three return ,all butt ... tubs and light tube optimized combinztion of new boiler,fuel gas flow length , good heat transfer.1 All pull side butt ... is large enough ,can be full absorbed heat ,the exhaust gas temperature is low ,heat loss low ,ensuring maximum output and ...