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F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
F02B75/00—Other engines
F02B75/28—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
F02B75/30—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders with one working piston sliding inside another
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FR607660D1925-03-201925-03-20
Improvements to internal combustion engines
ExpiredFR607660A
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