40 Machine and job shops services, namely, machining parts for others; computerized numeric control (CNC) turning and milling for others; contract manufacturing, precision turned product manufacturing, and precision milled product manufacturing in the field of oil exploration, off-shore drilling, drilling rigs, well boring components, namely, pipes, drill pipes, drill pipe attachments, drilling tools, pins, shafts, bushings, bearings, cylinders, brackets, pistons, steel rods, seals, metal sleeves, collars and nuts