mechanical, pneumatic, or hydraulic controls for machines; valves being parts of machines; pneumatic, hydraulic, and linear actuators for valves; drives for machines of metal or plastic that are operated manually or externally controlled; pressure switches being machine parts; diaphragm valves being machine parts; valve diaphragms being machine parts; valves, flaps, diaphragms for valves and taps made of plastic and/or metal as parts of machines and automation systems for the control of hydra...