DEVICES USED TO IMPROVE THE EVACUATION OF COMBUSTION PRODUCTS OF GAS-FIRED WATER HEATERS AND BOILERS OF OPEN CIRCUIT AND NATURAL DRAUGHT, INTENDED TO BE CONNECTED TO A FLUE WITH NOMINAL HEAT INPUT NOT EXCEEDING 70 KW.
用于改善燃气热水器和开路自然通风锅炉燃烧产物排放的装置 拟连接至标称热输入不超过70 KW的烟道