ON-LOAD

trailer-mounted air operated jacks; trailer-mounted lifting systems comprised primarily of compressed air-operated lift, mounting plates, brackets and connectors used to raise and lower the landing gear of semi-tractor trailers; trailer-mounted lifting systems comprised primarily of compressed air-operated lift, mounting plates, brackets and connectors used to stabilize suspension of semi-tractor trailers and raise or lower the trailers to line up to a loading dock; trailer-mounted nonhydraulic jacks