7 Machine parts being heads, namely, cutting heads, heads for ink jet printing machines, spray heads, multiple axis heads for use in drilling, and mosaic heads for impact printing machines, book-sewing machines; couplings for machines, namely, couplings for electric tool heads; machines, namely, machines for producing paper and cardboard, machines for the treatment of paper and cardboard, laser engraving machines, laser cutting machines, machines for manufacturing paper and cardboard boxes, machines for manufacturing corrugated paperboard, paper and cardboard bobbin winder and unwinder machines, paper and cardboard corrugating machines, paper and cardboard drying machines, paper and cardboard cutting machines, machines for manufacturing packaging material, extrusion machines, paper and cardboard feeding machines, flexographic printing machines, fluid dispensing machines, paper and cardboard splitter machines, paper and cardboard coating and enameling machines, machines for folding boxes of cardboard, paper and cardboard pressing machines, gluing machines, paper and cardboard stapling machines being stitching machines, stacking machines, machines for digital printing of corrugated paper and cardboard by injecting ink, laser cutting and laser splitting machines for corrugated paper and cardboard, packaging machines, machines for manufacturing and handling of cardboard