Agricultural machinery and attachments therefor, namely, rotary mowers, box scrapers, and three-point attachments; Tire chains and over-the-tire track systems for skid-steer loaders and other construction machinery; On-board fluid cleaning machinery; Mobile fluid cleaning machinery; Industrial fluid cleaning machinery; Assembly line conveyor machinery; Offshore rig pipe-handling machinery; Sewing machinery; Timber harvesting machinery; Bottle capping machinery; Thrusters for machinery; Silk spinning machinery; Silk reeling machinery; Pneumatic pipe-bursting machinery and auxiliary supportive devices used in the installation or replacement of utility pipe lines, cable lines, pipe tunnels and underground utility systems; Pneumatic pipe-ramming machinery and auxiliary supportive devices used in the installation or replacement of utility pipe lines, cable lines, pipe tunnels and underground utility systems; Pneumatic piercing machinery and auxiliary supportive devices used in the installation or replacement of utility pipe lines, cable lines, pipe tunnels and underground utility systems; Agricultural machinery, namely, tillers; Agricultural machinery, namely, threshers; Agricultural machinery, namely, harvesters; Agricultural machinery, namely, combines; Industrial machinery, namely, electromechanical marking machines; Self-lubricating mechanical friction parts, especially of composite materials, namely, wear rings, washers, bushings, spherical bearings, bearing pads, sliding blocks and machine transmission gears all for load bearing machines, conveyors, handling trucks and machines, lifting machines, agricultural machinery, construction equipment machines and hydraulic turbines