7 Machines for the alignment and repair of motor vehicles bodywork, namely, elevator benches and surface plates for use in lifting and holding vehicles and aligning and repairing vehicles bodies and frames; vehicle body and frame alignment, straightening equipment; collision repair equipment, namely, elevator benches and surface plates for use as a elevating or lifting work platform for vehicles; wet, dry and immersion shop vacuum cleaners; electric welding machines, namely, spot, arc, induction, gas welding guns, electrical dent removal stud welders and washer welders; Gas-operated welding machines; metal traction chains specially adapted as parts of machinery being elevator benches and surface plates used for lifting and holding vehicles and aligning and repairing vehicles bodies and frames