HEATING BOILERS - PART 6: HEATING BOILERS WITH FORCED DRAUGTH BURNERS - SPECIFIC REQUIREMENTS FOR THE DOMESTIC HOT WATER OPERATION OF COMBINATION BOILERS OF NOMINAL HEAT INPUT NOT EXCEEDING 70 KW.
供暖锅炉.第6部分:带强制排水燃烧器的供暖锅炉.额定热输入不超过70kW的组合锅炉的家用热水操作的特殊要求