DIN EN 303-1-2003 采暖锅炉.第1部分:带强制通风燃烧器的采暖锅炉.术语、一般要求、检验和标记
Heating boilers - Part 1: Heating boilers with forced draught burners; Terminology, general requirements, testing and marking (includes Amendment A1:2003); German version DIN EN 303-1:1999 + A1:2003