Home / Standards / GB/T 1856-1993 GB/T 1856-1993 Abolished Marine flanged cast iron single arrangement exhaust stop box valve 船用法兰铸铁单排排出截止阀箱 Standard Type GBT ICS 47.020.30 CCS U52 Status 废止 Issue Date 1993-07-21 Implementation 1994-03-01 Responsible Dept 国家标准委 Drafting Unit N/A