Home / Standards / JB/T 5420-2001 JB/T 5420-2001 Abolished 同向双螺杆塑料挤出机 Standard Type JB ICS N/A CCS N/A Status Abolished Issue Date 2001-05-23 Implementation 2001-10-01 Centralized Committee 中国机械工业联合会 Issuing Authority 中国机械工业联合会