Home / Standards / NB/T 31024-2012 NB/T 31024-2012 Abolished 风力发电机组 偏航液压盘式制动器 Standard Type NB ICS N/A CCS N/A Status Abolished Issue Date 2012-08-23 Implementation 2012-12-01 Centralized Committee 国家能源局 Issuing Authority 国家能源局