Radiation protection instrumentation - Radon and radon decay product measuring instruments - Part 2: Specific requirements for 222Rn and 220Rn measuring instruments (IEC 61577-2:2014, modified); German version EN 61577-2:2017
辐射防护仪器.氡和氡衰变产物测量仪器.第2部分:222Rn和220Rn测量仪器的特殊要求(IEC 61577-2-2014 修改);德文版EN 61577-2:2017