Home / Standards / GB/T 4949-2018 GB/T 4949-2018 Active Chemical analysis methods for sacrificial anodes of Al-Zn-In system alloy 铝-锌-铟系合金牺牲阳极化学分析方法 Standard Type GBT ICS 77.120.10 CCS H12 Status 现行 Issue Date 2018-05-14 Implementation 2018-12-01 Responsible Dept 国家标准委 Drafting Unit N/A