... ofelectrochemicalmarking ofmetalssuch as stainless steel, carbon steel, various alloy steel.Tool steel, carbide, copper alloy, a variety of chrome, nickel, zincmaterial ... , heater3. instrumentation components, electronic components, and toolsequipment, clocks, glasses;4. machine tool accessories, gear bearings,valves,faucets, machine parts, vehicle accessories;5 ...