7 Tools, namely, electrically powered, powder-actuated, gas-operated, pneumatic or combustion-type stationary tools, namely, powder-actuated tools for threaded studs and nails, air nailers, air staplers, tacking tools, electric screwdrivers, drilling machines, hammer drills, breakers, diamond coring and cutting machines, chiseling hammers, saws, slitting tools, grinders, vacuum cleaners; [ welding equipment and similar machines and tools, namely, machines for working stone, masonry and wood; ] power tools for metering, dispensing, applying and injecting liquid, pasty and solid masses; spare parts and accessories, namely, containers, cartridges and holders for the masses for the previously named machines and tools; tool and machine suspensions in the nature of stativs, supports, suspension devices, consoles, bottom supports; power tool and machine stands, power drive units, power drill bits including diamond drill bits and core bits, power saws, power saw blades as well as grinding and cutting discs, chisels and bits; static mixers