7 machines parts, namely, LPG pressure reducers, LPG vaporizers, CNG pressure reducers, CNG vaporizers; step motors for gas adjustment; industrial power-operated mixers for gas dosage; machine parts, namely, multivalves for LPG tanks, gas lock-off or shut-off valves, petrol lock-off of shut-off valves (mechanical); LPG vapor injectors; metered LPG filling pumps; machines parts, namely air filter pressure relief valves; electronic fuel injectors for land vehicle engines