Home / Standards / JB/T 7978-1995 JB/T 7978-1995 Abolished 钢平尺和岩石平尺 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 1996-04-14 Implementation 1996-04-14 Centralized Committee 机械工业部 Issuing Authority 机械工业部