DIN EN 15502-2-1:2017
燃气式中央供暖锅炉.第2-1部分:额定热输入不超过1000 kW的C型电气用具和B2,B3及B5型电气用具的具体标准;德文版本EN 15502-2-1-2012+A1-2016
Gas-fired central heating boilers - Part 2-1: Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat input not exceeding 1 000 kW; German version EN 15502-2-1:2012+A1:2016