37 Maintenance and repair of machines, equipment, and apparatus for collating, sorting, decollating, counting, positioning, packing, shrink-wrapping, banding, printing, inspecting, labeling, perforating, pasting, punching and stacking products of paper or plastic, namely paper articles, labels, greeting cards, envelopes, instruction leaflets, operating instructions, register sheets, playing cards, telephone cards, credit cards, cardboard blanks, CDs, CD covers, DVDs, plasters, tablet blister packs, woven and non-woven products, office requisites, PC printer paper, banknotes, photographic paper, equipment and apparatus