Home / Standards / GB/T 593-1993 GB/T 593-1993 Abolished Marine bronze and cast iron flanged cocks 船用法兰青铜、铸铁填料旋塞 Standard Type GBT ICS 47.020.30 CCS U53 Status 废止 Issue Date 1993-05-24 Implementation 1994-01-01 Responsible Dept 国家标准委 Drafting Unit N/A