Machine parts, namely, polishing discs, polishing wheels and polishing brushes for machines for polishing printing plates, printing cylinders, gravure printing cylinders or embossing forms; brushes for use with machines for polishing printing plates, printing cylinders, gravure printing cylinders or embossing forms; electric machines for polishing printing plates, printing cylinders, gravure printing cylinders or embossing forms; Electrically-operated brushes, being parts of machines; machine...