Precision grinding machines, namely, grinding machines for floors; grinder machines; grinding tools for grinding machines; machines and apparatus for polishing electric; polishing discs for use with electric floor polishers; machines, namely, leveling mounts for machines, floorscrapers, shootblasting for floors, hydraulic grinders and carrier vehicle (tractor); Industrial robots for surface preparation, namely, floors, ceilings, walls, for grinding and polishing; rotary grinding machines; hea...