42 manufacture of; machines for use in manufacturing and/or assembly processes; namely, industrial robots and conveyors; apparatus for detecting leaks in fluid containing chambers; namely, fuel tanks, drums, cans, wheels and torque converters; and laser welding machines; and laser cutting machines for use in cutting sheet metal and similar metal and alloy materials; and laser welding and cutting applications; and custom manufacturing services for others; namely, cutting and welding alloy materials using lasers