Mechanical seals, and their structural parts and fittings; concrete and asphalt mixers for circulating liquid media and agitators for chemical processing; rubber, synthetic resin and plastic machine parts for technical purposes, namely, steam traps, ball valves, condensation traps, butterfly valves, reducers, membrane valves, valves, vacuum filters, driers, coupling discs and brake linings, driving belts, conveyor belts, v-belts, and other clutch components, brake segments, injectors, cylinde...