Home / Standards / GB/T 28721-2012 GB/T 28721-2012 Active Cathodic protection of reinforcing steel in atmospherically exposed concrete structures 大气环境混凝土中钢筋的阴极保护 Standard Type GBT ICS 25.220.99 CCS A29 Status 现行 Issue Date 2012-09-03 Implementation 2013-02-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A