DIN EN 303-4:1999 供暖锅炉.第4部分:带强制送风燃烧炉的供暖锅炉.功率70kV以下,最大工作压力3巴的带强制送风的油燃烧炉的供暖锅炉的特殊要求.术语、特殊要求、试验和标记
Heating boilers - Part 4: Heating boilers with forced draught burners; special requirements for boilers with forced draught oil burners with outputs up to 70 kW and a maximum operating pressure of 3 bar; terminology, special requirements, testing and mark