Internal-combustion engines convertible into other combustion-engine type, not provided for in [CPC: F02B11/00]; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different cycles, e.g. convertible from two-stroke to four stroke
Internal-combustion engines convertible into other combustion-engine type, not provided for in [CPC: F02B11/00]; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different cycles, e.g. convertible from two-stroke to four stroke