#stamp_mill__stampmill__stamping_mill  a mill in which ore is crushed with stamps
  supertype:  #factory__mill__manufacturing_plant__manufacturingplant__manufactory  a plant consisting of buildings with facilities for manufacturing
  subtype:  #stamp_battery__stampbattery__battery  a series of stamps operated in one mortar for crushing ores
  subtype:  #quartz_battery__quartz_mill  a stamp mill for stamping quartz

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