Home / Standards / GB/T 2972-1991 GB/T 2972-1991 Abolished Zinc-coated steel wire--Test method for uniformity of zinc coating on wire by the copper sulphate dip 镀锌钢丝锌层硫酸铜试验方法 Standard Type GBT ICS 25.220.40 CCS H25 Status 废止 Issue Date 1991-03-26 Implementation 1992-01-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A