ISO 6621-4:2015现行
Internal combustion engines - Piston rings Part 4: General specifications
出版：International Organization for Standardization
专家解读视频
This part of ISO 6621 specifies the general characteristics of piston rings for reciprocating internal combustion engines for road vehicles and other applications (the individual dimensional criteria for these rings are given in the relevant International Standards).
DIN ISO 6621-4 : 1990 - Identical
UNE 26417-4 : 1994 - Identical
BS ISO 6621-4 : 2015 - Identical
DIN 70909 : 1987 - Similar to
NF ISO 6621-4 : 1989 - Identical
NBR ISO 6621-4 : 2016 - Identical
UNI ISO 6621-4 : 1992 - Identical
NBR ISO 6621-4 : 2016 - Identical
BS ISO 6621-4 : 2015 - Identical
