DL/T 760.3-2012
Grading ring、shielding ring、grading and shielding ring
JB/T 11930-2014
Feed pellet mill - Ring die - Accuracy
JB/T 14012-2020
HB 1809-2012(2017)
JB/T 10628-2006
Internal combustion engines-Piston rings-Steel rectangular rings
JB/T 7255-2007
Water ring vacuum pumps and compressors
HB 954-2000
HB 7387.19-1996
QJ 2760.2-1995
QJ 2760.1-1995
JB/T 5208-1991
JY 0300-1991
GB/T 14223-1993
Internal combustion engines—Piston rings—Keystone rings and half keystone rings
HB 4108-1988
HB 1361-1987
HB 1578-1987
GB/T 14222-1993
Internal combustion engines—Piston rings—Rectangular rings
GB/T 1149.5-1992
Internal combustion engines—Piston rings-Oil control rings
GB/T 1149.3-1992
Internal combustion engines—Piston rings-Scraper rings
DL/T 760.3-2001
Grading ring、shielding ring、grading and shielding ring