7 Loading-unloading machines and apparatus, namely,chain conveyors, bucket elevators, lifters, namely, industrial lift tables, machine elements not for land vehicles, namely, chains, cable drag chains, belts,sprockets, gears, gearboxes, pulleys, couplings, clutches, torque limiters, reduction gears for electromotive motors, speed change gears, power transmission devices for industries, shock absorbers, cylinders, and bearings