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Found: 4

ISO 6621-4:2015

Internal combustion engines — Piston rings — Part 4: General specifications

ISO 6621-4:1988

Internal combustion engines — Piston rings — Part 4: General specifications

ISO 6621-4:2003

Internal combustion engines — Piston rings — Part 4: General specifications

ISO 6621-4:2024

Internal combustion engines — Piston rings — Part 4: General specifications

Overview ISO 6621-4:2024 sets forth the general specifications for piston rings used in reciprocating internal combustion engines. Developed by the International Organization for Standardization (ISO…