Home / Standards / GB/T 38520-2020 GB/T 38520-2020 Active Marine cryogenic breakaway coupling 船用超低温拉断阀 Standard Type GBT ICS 47.020.99 CCS U52 Status 现行 Issue Date 2020-03-06 Implementation 2020-10-01 Responsible Dept 国家标准委 Drafting Unit N/A