Read Edit View history 石炭層 shítàncéng coal seam Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 石炭层/ 石炭層 shítàncéng coal seam a layer or bed of coal in the earth's crust Edit Delete References Add reference same_as 炭层/炭層 → 石炭层/石炭層 Edit Delete