Home / Standards / JB/T 7239-1994 JB/T 7239-1994 Abolished 往复活塞压缩机用网状阀片 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 1994-07-18 Implementation 1995-07-01 Centralized Committee 机械工业部 Issuing Authority 机械工业部