Home / Standards / GB/T 25921-2010 GB/T 25921-2010 Active Electrical and instrumentation loop check 电气和仪表回路检验规范 Standard Type GBT ICS 25.040.40 CCS N10 Status 现行 Issue Date 2011-01-14 Implementation 2011-05-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A