AUTOMOBILE FRAME AND BODY REPAIR SYSTEM COMPRISED OF PORTABLE BENCH WITH MOVABLE TROLLEYS TO SUPPORT AND POSITION THE AUTOMOBILE THEREON, HYDRAULIC PUMPS, LIFTS, HOISTS, TRACTION BARS, RAMS AND PULLERS FOR STRAIGHTENING, WORKPIECE CENTERING DISCS AND FLANGES, CLAMPS AND SUPPORT ARMS FOR HOLDING AUTO BODY PARTS IN PLACE DURING WELDING AND STRAIGHTENING, ANCHORING LEGS, CHAINS AND CASTERS, AND PARTS THEREFOR