| 单词 | singing coal | 
| 释义 | > as lemmassinging coal   singing coal  n. (See quot. 1883). ΘΚΠ the world > the earth > minerals > mineral deposits > 			[noun]		 > stratum or bed > of coal > seam of specific coal singing coal1855 jet seam1873 1855    J. Phillips Man. Geol. 193  				Strata, including singeing 		[sic]	 coal. 1883    W. S. Gresley Gloss. Terms Coal Mining 223  				Singing Coal, a bed of coal from which gas is ordinarily issuing from the partly-exposed face in the mine, producing a hissing sound. < as lemmas  | 
	
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