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  1. A paper container roughly 2.5 to 5 cm in diameter and 20 to 46 cm long, used for placing an inert material, such as sand, clay, etc., into a borehole for stemming or tamping. Also called a tamping bag.
  2. A long tube fastened at the upper end to a pipe leading from a smelter, and gathered and tied at the lower end. The smoke passes through the cloth, which catches the solids. The bag is periodically untied and the dust is shaken out. See also: baghouse
  3. A cavity in coal containing gas or water. See also: bag of gas Tomkeieff
  4. Flexible pipe or hose. Also called bagging. Mason
  5. S. Staff. A quantity of combustible gases suddenly given off by the coal seam. See also: bag of foulness
  6. York. A miner's term for a variety of inferior coal. Tomkeieff

Source: Dictionary of Mining, Mineral, and Related Terms

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