Crush onion rings in a gallon size baggie. Add bread crumbs and flour to baggie. Shake to mix. Rinse chops and pat dry with paper towel. Put pork chops in baggie and shake to coat. Put chops into greased pan. Cover with remaining crumbs. Bake at 400 degrees, covered loosely with foil, for 1/2 hour or so, then uncover to finish for another 1/2 hour. (Less time for thinner chops.)