Electrical apparatus for the detection and measurement of flammable gases - Part 1: General requirements and test methods (IEC 61779-1:1998, modified); German version EN 61779-1:2000
可燃气体检测和测量用电气设备.第1部分:一般要求和试验方法(IEC 61779-1-1998 修改);德文版EN 61779-1:2000