Home / Standards / GB/T 1952-2015 GB/T 1952-2015 Active Marine low pressure bronze male threaded check valves 船用低压外螺纹青铜止回阀 Standard Type GBT ICS 47.020.30 CCS U52 Status 现行 Issue Date 2015-07-03 Implementation 2015-10-01 Responsible Dept 国家标准委 Drafting Unit N/A