87183843
Sep 26, 2016
Sep 26, 2017
metal drill pipes, and metal down-hole drilling hardware in the nature of double-end swivels and plugs, pipe collars, oil-well casings, rollers, reinforcing pins, bit baskets, and suction cups
Metal Goodsmachine shop services , namely manufacturing, to the specification of others, down-hole drilling parts made of various metals
Treatment of Materials