[ metal working machinery, namely, wire forming machines and welding machines; cargo handling machinery, namely, pneumatic conveyors; chemical machinery, namely, crushing machines and grinding mills; textile, pulp-making, paper-making and paper processing machinery, namely, solid-liquid separators; ] pneumatic machinery, namely, fans and blowers; and machine parts, namely, [shafts for ball bushings, ] linear motion bearings, [ couplings for machines, ] bearing balls, [ grinding media, burnishing media, ] ball screws, [ positioning tables, and feed screws for power transmission ]