Home / Standards / GB/T 21246-2007 GB/T 21246-2007 Abolished Measurement method for cathodic protection parameters of buried steel pipelines 埋地钢质管道阴极保护参数测量方法 Standard Type GBT ICS 75.180.30 CCS E98 Status 废止 Issue Date 2007-11-01 Implementation 2008-05-01 Responsible Dept 国家标准委 Drafting Unit N/A