GB/T 1149.4-1994 Internal combustion engines—Piston rings—Quality requirements

GB/T 1149.1-1994 Internal combustion engines—Piston rings—General specifications GB/T 1149.2-1994 Internal combustion engines—Piston rings—Vocabulary GB/T 1149.6-1994 Internal combustion engines—Piston rings—Inspection measuring principles GB/T 1149.7-1994 Internal combustion engines—Piston rings—Coil-spring-loaded oil control rings

GB 1149-1982

GB/T 1149.4-2008 Internal combustion engines—Piston rings—Part 4:Quality requirements

GB/T 230.1-2004 Metallic Rockwell hardness test—Part1:Test method(scales A、B、C、D、E、F、G、H、K、N、T) GB/T 230.1-2009 Metallic materials—Rockwell hardness test—Part 1:Test method(scales A、B、C、D、E、F、G、H、K、N、T) GB/T 230.1-2018 Metallic materials—Rockwell hardness test—Part 1:Test method GB/T 230.2-2002 Metallic rockwell hardness test—Part 2:Verification and calibration of hardness testers(scales A,B,C,D,E,F,G,H,K,N,T) GB/T 230.2-2012 Metallic materials—Rockwell hardness test—Part 2:Verification and calibration of testing machines GB/T 230.2-2022 Metallic materials—Rockwell hardness test—Part 2:Verification and calibration of testing machines and indenters GB/T 230.3-2002 Metallic rockwell hardness test—Part 3:Calibration of hardness reference blocks(scales A,B,C,D,E,F,G,H,K,N,T) GB/T 230.3-2012 Metallic materials—Rockwell hardness test—Part 3:Calibration of reference blocks(scales A,B,C,D,E,F,G,H,K,N,T) GB/T 230.3-2022 Metallic materials—Rockwell hardness test—Part 3:Calibration of reference blocks GB/T 1149.1-1994 Internal combustion engines—Piston rings—General specifications GB/T 1149.1-2008 Internal combustion engines—Piston rings—Part 1:General specifications GB/T 1149.2-1994 Internal combustion engines—Piston rings—Vocabulary GB/T 1149.2-2010 Internal combustion engines—Piston rings—Part 2:Vocabulary GB/T 1149.3-1992 Internal combustion engines—Piston rings-Scraper rings GB/T 1149.3-2010 Internal combustion engines—Piston rings—Part 3:Material specifications GB/T 1149.5-1992 Internal combustion engines—Piston rings-Oil control rings GB/T 1149.5-2008 Internal combustion engines—Piston rings—Part 5:Inspection measuring principles GB/T 1149.6-1994 Internal combustion engines—Piston rings—Inspection measuring principles GB/T 1149.6-2008 Internal combustion engines—Piston rings—Part 6:Scraper rings made of cast iron GB/T 1149.6-2021 Internal combustion engines—Piston rings—Part 6:Scraper rings made of cast iron GB/T 1149.7-1994 Internal combustion engines—Piston rings—Coil-spring-loaded oil control rings GB/T 1149.7-2010 Internal combustion engines—Piston rings—Part 7:Rectangular rings made of cast iron GB/T 14222-1993 Internal combustion engines—Piston rings—Rectangular rings GB/T 14223-1993 Internal combustion engines—Piston rings—Keystone rings and half keystone rings

ISO 6621/3-1983