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Various gearwheels are used in mechanical engineering: cylindrical (cylindrical and helical), single-rim and multi-rim (block), conical with straight, oblique or circular teeth, worm wheels, internal gearing wheels, as well as gear racks, gear sectors, bevels, noncircular gears, gear shafts.Gearwheel teeth can be produced by means of copying, hobbing, or rolling.When repairing various machines or mechanisms, it is often necessary to manufacture gearwheels that are designed in different systems according to different standards and in different countries. Any given company might not have a...