gang saw
  直鋸
  Gang, n.
  1. A going; a course. [Obs.]
  2. A number going in company; hence, a company, or a number of persons associated for a particular purpose; a group of laborers under one foreman; a squad; as, a gang of sailors; a chain gang; a gang of thieves.
  3. A combination of similar implements arranged so as, by acting together, to save time or labor; a set; as, a gang of saws, or of plows.
  4. Naut. A set; all required for an outfit; as, a new gang of stays.
  5.  Mining The mineral substance which incloses a vein; a matrix; a gangue.
  Gang board, or Gang plank. Naut. (a) A board or plank, with cleats for steps, forming a bridge by which to enter or leave a vessel. (b) A plank within or without the bulwarks of a vessel's waist, for the sentinel to walk on.
  Gang cask, a small cask in which to bring water aboard ships or in which it is kept on deck.
  Gang cultivator, Gang plow, a cultivator or plow in which several shares are attached to one frame, so as to make two or more furrows at the same time.
  Gang days, Rogation days; the time of perambulating parishes. See Gang week (below).
  Gang drill, a drilling machine having a number of drills driven from a common shaft.
  Gang master, a master or employer of a gang of workmen.
  Gang plank. See Gang board (above).
  Gang plow. See Gang cultivator (above).
  Gang press, a press for operating upon a pile or row of objects separated by intervening plates.
  Gang saw, a saw fitted to be one of a combination or gang of saws hung together in a frame or sash, and set at fixed distances apart.
  Gang tide. See Gang week (below).
  Gang tooth, a projecting tooth. [Obs.] --Halliwell.
  Gang week, Rogation week, when formerly processions were made to survey the bounds of parishes. --Halliwell.
  Live gang, or Round gang, the Western and the Eastern names, respectively, for a gang of saws for cutting the round log into boards at one operation. --Knight.
  Slabbing gang, an arrangement of saws which cuts slabs from two sides of a log, leaving the middle part as a thick beam.
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