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ISO 6622-2:2013
Internal combustion engines - Piston rings - Part 2: Rectangular rings made of steel
ISO 6622-2:2013 specifies the essential dimensional features of rectangular rings made of steel, types R, B, BA, and M having nominal diameters from 30 mm up to and including 160 mm, used in reciprocating internal combustion piston engines for road vehicles and other applications.
International Organization for Standardization [iso]