4 ABRASIVE, SCOURING AND POLISHING MATERIAL CONSISTING OF GLASS, METAL AND OTHER MATERIALS IN PARTICULATE FORM FOR USE IN GRINDING AND POLISHING MACHINES
6 ANTI-RUST AND ANTI-CORROSIVE COMPOSITIONS FOR APPLICATION TO METAL SURFACES
23 MACHINES FOR TREATING THE SURFACES OF WORK PIECES-NAMELY, GRINDING AND POLISHING MACHINES, AND PARTS OF SUCH MACHINES