This standard specifies the nomenclature of internal combustion engine product names and the rules for formulating their models. This standard applies to reciprocating internal combustion engines (hereinafter referred to as internal combustion engines), and special-purpose engines can also be used as a reference.
GB/T 725-1991 history
2008GB/T 725-2008 Internal combustion engines.Nomenclature and code of designations
1991GB/T 725-1991 Internal combustion engines.Nomenclature and code of designations