Mechanical conveyors for transporting bulk materials; conveyor installations; machines, mechanical apparatus and installations assembled from these especially for the chemical, pharmaceutical, plastics, rubber, mineral material, textile, cosmetic and food industry and for power plants; parts of the aforementioned apparatus, installations and plants, namely, mixing machines, grinding devices, kneading and granulating machines, centrifugal machines and reactors (machine parts); mechanical bulk material processing plants; pneumatic, hydraulic and mechanical conveyors (machines) for bulk materials; separators (machines); centrifugal machines, mixing machines; discharging devices (machine parts) for discharging bulk materials from containers, silos and bunkers; dosing and discharging screw machines; cellular wheel sluices (machines); diverters for pneumatic or hydraulic conveying machines for bulk materials; pumps (machines); axial flow blowers and centrifugal blowers (machines); compressors (machines); filters (parts of machines or motors); valves (machine parts); valves, slide valves (machine parts), fans (for motors) and classifying devices (sorting machines for industry); closing and discharging devices (machine parts); heat exchangers as parts of machines; pneumatic and mechanical machines for charging and discharging ships, railcars, containers and reservoirs; screw extruders for the food, plastics, rubber and chemical industry, gears for such screw extruders, granulating devices for such screw extruders, parts of dust and water separators (machines) made of metal, namely, cyclones (machine parts), filters (machine parts), water separators, nozzles made of metal (machine parts), shut-off devices with displaceable shut-off member made of metal (machine parts); electric control devices for machines, machine parts or motors; parts of the aforementioned goods as far as included in this class