Home / Standards / NB/T 20124-2012 NB/T 20124-2012 Abolished 压水堆核电厂生物屏蔽混凝土施工验收规范 Standard Type NB ICS N/A CCS N/A Status Abolished Issue Date 2012-01-06 Implementation 2012-04-06 Centralized Committee 国家能源局 Issuing Authority 国家能源局