Machines for generating hydrogen and oxygen by electrolysis; electromechanical machines for chemical industry; wind-powered installations for generating electricity; wind-powered installations for generating motive power; wind turbines; dynamo belts; windmills; hydroelectric installations for generating electricity; turbines, other than for land vehicles; machines for generating gas by electrolysis; gas separating installations; machines for generating oxygen and nitrogen; gas liquefying installations; electricity generators; dynamos; generators of electricity; current generators; bellows [parts of machines]; valves [parts of machines]; pumps [parts of machines, engines or motors]; pneumatic controls for machines, motors and engines; bearings [parts of machines]; machine wheelwork.