7 Machines and machine tools for treatment of materials and for manufacturing, namely, casting machines, die cutting and stamping machines, press dies for metal forming, metal working machines, plastics working machines, palletizers, case elevators, automatic pallet dispensing machines and automatic slip sheet dispensing machines, deep drawing machines and machines for forming materials by means of differential pressure, welding presses, power-operated rivet guns, jointers, machines for hemming metal, screwing machines; Industrial robots; Welding machines, namely, resistance-welding machines, projection welding machines, spot welding machines, electric arc welding machines, friction welding machines, gas welding machines, welding machines using the principle of an arc moved magnetically, laser beam welding machines, laser beam cutting machines; Welding installations comprised of the above-mentioned welding machines, conveyors, being machines, tensioner machines, industrial robots and welding robots, for execution of welding work; Transporting machines and conveying machines, namely, conveyor belts, plate conveyors, roller conveyors, roller blocks, chain conveyors, sliding conveyors, oscillating conveyors, pneumatic and hydraulic conveyors, and lifting installations for the transport of goods; Electric welding machines; Replacement parts for all of the foregoing machines