Home / Standards / JB/T 1308.1-1999 JB/T 1308.1-1999 Abolished PN250MPa阀门型式和基本参数 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 1999-07-12 Implementation 2000-01-01 Centralized Committee 国家机械工业局 Issuing Authority 国家机械工业局