Home / Standards / CB 738-1977 CB 738-1977 Abolished 铝质斜梯 Standard Type CB73 ICS N/A CCS N/A Status Abolished Issue Date 1977-01-01 Implementation 1978-10-01 Centralized Committee 中国船舶工业集团公司 Issuing Authority 中国船舶工业集团公司