structural parts of paper-making machines, namely, bands and belts made of felts, sieves, knitted fabrics, and wire chain, and bands and belts made of combinations thereof, all for moving and guiding paper webs; structural parts of cardboard-making machines, namely, belts for the manufacture of corrugated cardboard; dehydration belts as parts of machines for the production of fiber boards and fiber tubes; machine parts, namely, [ cylinder fabrics and felts for covering rollers for calenders, ...