Valves of metal being parts of machines; [ cylinders and couplings for machines; fitting parts of machines, namely, earthmoving machinery, excavators, tractors, drills, dispensers, compressors, fire safe systems, pressure washers, hydraulics power units and hydraulics circuits; pressure regulators being parts of machines; pressure reducers as parts of Machines; parts of compressed air and pneumatic machines, namely, valves; ] hydraulic [ and pneumatic ] valve actuators [ as parts of machines;...