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    Drilling.    Origin Latin " trilix ", three threads.    Stout, twilled
    cotton material, bleached, unbleached or piece-dyed usually unbleached. Light weight drill called Jean or Middy Twill. A khaki-colored drill is called Khaki. Known by weight as 2.50 meaning 2.50 yards in one pound. Other common weightsare 2.85 and 3.00. Uses: uniforms, pocket linings, middy blouses.   Weave—twill.