Motors and engines other than for land vehicles; machine couplings and transmission components other than for land vehicles; parts of machines and machine tools, especially valves; pressure reducers as parts of machines; pneumatic valves actuators for vehicles; pressure reducers for vehicles; valves of plastics as parts of machines for filling cut-off devices; clack valves as parts of machines; metallic or non metallic non-return valves as parts of machines; electromagnetic valves for vehicle...