7 Machines and their parts and fittings for hydrogen fuel charging station, namely, compressors, cylinders, accumulators, freezing units, fuel dispensers, valves for pumps, bearings, liquid tanks, lubricators, shock absorber; self-regulating hydrogen fuel pumps; hydrogen fuel pumps for hydrogen fuel service station; machines and their parts and fittings for a gas station, namely, compressors, cylinders, accumulators, freezing units, fuel dispensers, valves for pumps, bearings, liquid tanks, lubricators, shock absorber; self-regulating fuel pumps