7 Cutting, drilling, abrading, sharpening and surface treatment machines and apparatus, namely all of the following: diamond blades for power cutters and power-operated floor saws; power tools, namely power cutters; power-operated cutters for concrete, granite, roof tiles, ceramic tiles, marble, natural stones, bricks, blocks, asphalt, iron, porcelain; power-operated saws, namely, power-operated wall saws, road- and floor saws, wire saws, tile and masonry saws; core drilling machines, power-operated drill machines; power-driven concrete and floor grinders, grinding and polishing machines, pavement cutting power grinders, power-operated sharpeners, power-operated sanders, concrete cutting machines and equipment, namely, power-operated concrete vibrators, concrete screeds, power trowels, and early entry saws; power cutters; handheld saws being machines; power-operated saws; blades being machine parts; saw blades being parts of machines; power saw blades; diamond cutting tools for machines, namely power cutters; diamond-pointed metal-cutting tools; diamond tools being parts of machines namely power cutters; diamond core bits and drills for machines; diamond segments, diamond cup wheels, diamond discs, diamond polishing pads and diamond blocks, all of the foregoing being parts and equipment for surface preparation in the nature of power cutters; diamond tools being parts of machines in the nature of power-operated machines for cutting wires, stationary wires, quarry wires, multiwire; diamond blades, namely, power-operated gang saw blades, circular blades for power saws, and diamond grinding pads, drills, and core bits, for use in the stone industry to cut, polish, or process natural stone