Auxiliary power units for supplying electrical power; Auxiliary power units for supplying electrical power to heat and power generators; Blades for power saws; Blades for power tools; Chucks for power drills; Concrete construction machines; Electric jacks; Electric power generators using geothermal power; Emergency power generators; Geothermal power generators; Hydraulic jacks; Hydraulic power packs; Hydraulic power units; Lifting jacks other than hand-operated; Pneumatic jacks; Power drill bit extensions; Power drill bits; Power drills; Power driven polishers; Power hammers; Power jacks; Power looms; Power machines and attachments, namely, jack hammers; Power machines for mowing; Power operated jacks; Power saw blades; Power saws; Power shovels; Power staplers; Power tillers; Power winches; Power-driven spanners; Power-driven wrenches; Power-operated abrasive wheels; Power-operated blowers; Power-operated boat lifts; Power-operated cultivators; Power-operated dethatchers; Power-operated hoists; Power-operated jacks; Power-operated meat grinders; Power-operated nailing guns; Power-operated plumbing snakes; Power-operated polishers; Power-operated potters' wheels; Power-operated ratchet wrenches; Power-operated saws; Power-operated screwdrivers; Power-operated shears; Power-operated sprayers; Power-operated staple guns; Road construction machines; Robots for building construction; Rubber tracks being parts of construction machines; Rubber tracks being parts of crawlers on construction 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; Stands for hydraulic jacks; Tire chains and over-the-tire track systems for skid-steer loaders and other construction machinery; Trailer mounted hydraulic jacks; 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