Home / Standards / CB 3449-1992 CB 3449-1992 Abolished 船用平衡阀基本参数和连接尺寸 Standard Type CB34 ICS N/A CCS N/A Status Abolished Issue Date 1992-03-07 Implementation 1992-10-01 Centralized Committee 中国船舶工业总公司 Issuing Authority 中国船舶工业总公司