Home / Standards / GB/T 4950-2021 GB/T 4950-2021 Active Sacrificial anode of zinc alloy 锌合金牺牲阳极 Standard Type GBT ICS 47.020.05 CCS A29 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 国家标准委 Drafting Unit N/A