Fuel valves being parts of engines, combustion engine fuel nozzles, fuel injection systems for engines consisting primarily of fuel pumps, fuel and air mixture regulators being parts of internal combustion engines; fuel pumps for engines, land vehicles, service stations; fuel filters, non-metallic butterfly valves being parts of machines, servo-valves, hydraulic valves as parts of machines, clack valves as parts of machines, waste valves as parts of machines, dust removing installations for c...