A soft disposable ejector tip 2 that can match the various contour of the mouth cavity is attached to a chamfer shape copper wire reinforced tube end 3. The invention extracts uniform text and other uniform color objects that carry detail information. After the second change in drag force is identified, the planarization process is stopped. The data protection system prescribes nodes that are reached from the node on the lowest level and a terminal to the node on the highest level that is an invalid node.