Home / Standards / GB/T 568-1965 GB/T 568-1965 Abolished Marine pipe flanges--Types 船用法兰类型 Standard Type GBT ICS 47.020.30 CCS U55 Status 废止 Issue Date 1965-07-16 Implementation 1966-01-01 Responsible Dept 国家标准委 Drafting Unit N/A