Home / Standards / JB/T 1308.15-1999 JB/T 1308.15-1999 Abolished PN250MPa阶端双头螺柱型式、尺寸和技术条件 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