【机械工程】内燃机，内燃　往复活塞发动机

direct with burning cartridge for internal-combustion engines

throtting, internal-combustion engine

pre-injection and main injection, internal-combustion engine

internal-combustion engines

throttling, internal-combustion machine

conjoint drive for lift valves and drives for internal-combustion engines

spark ignition installation internal-combustion engine

spark ignition, electric with two or more sparking plugs for internal-combustion engines