Home / Standards / GB/T 2499-1993 GB/T 2499-1993 Abolished Marine cast iron flange dual-row stop valves-case 船用法兰铸铁双排截止阀箱 Standard Type GBT ICS 47.020.30 CCS U52 Status 废止 Issue Date 1993-05-24 Implementation 1994-01-01 Responsible Dept 国家标准委 Drafting Unit N/A