Home / Standards / GB/T 1560-1979 GB/T 1560-1979 Abolished Normal diameters for ventilation pipeline and accessories for ships metric series 船用通风系统管路和附件的公称通径 Standard Type GBT ICS 47.020.80 CCS U54 Status 废止 Issue Date 1979-06-23 Implementation 1980-05-01 Responsible Dept 国家标准委 Drafting Unit N/A