Home / Standards / JB/T 8428-1996 JB/T 8428-1996 Abolished 校正钢焊缝超声波检测仪器用标准试块 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 1996-09-03 Implementation 1997-07-01 Centralized Committee 机械工业部 Issuing Authority 机械工业部