REPAIR AND MAINTENANCE OF CARGO TRAILERS-NAMELY, REPLACING BODY PANELS, PAINTING TRAILER, INSTALLING CLEARANCE LIGHTS, CHANGING VACUUM TO AIR BRAKES, INSTALLING NEW ROOF, INSTALLING TIRE CARRIER, REMOVING AND REPLACING REAR SPRING HANGAR ON SINGLE AXLE, REPLACING ENTIRE FLOOR OF TRAILER, REPACKING WHEELS, REPLACING BROKEN SPRINGS, REPAIRING BRAKE SYSTEM, AND RELINING BRAKES