DIN EN 61577-3-2015 辐射防护检测仪表.氡和氡降解产品的测量仪器.第3部分:氡降解产品的测量仪器特殊要求(IEC 61577-3-2011, 修正);德文版本EN 61577-3-2014
Radiation protection instrumentation - Radon and radon decay product measuring instruments - Part 3: Specific requirements for radon decay product measuring instruments (IEC 61577-3:2011, modified); German version EN 61577-3:2014