Cranes; Conveyers being machines; Lifting installations for the transport of persons and goods; Loading and unloading machines; Mechanical and hydraulic lifts; Mixing machines; Mobile lifting work platforms; Packaging 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,...