Material handling machines, namely, palletizers, case elevators, automatic pallet dispensing machines and automatic slip sheet dispensing machines; Components for machines and machine tools, grinding machines, material handling machines, food processing machines, chemistry processing machines and textile industry machines, namely, sand, chemical and reverse osmosis filters; 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; Truck bed-mounted material handling machinery primarily for use in the construction materials delivery industry, namely, hydraulic extendable material conveyors, mechanical extendable material conveyors, and truck bed material lifting platforms