褐かっ炭たん

noun, noun which may take the genitive case particle 'no'

brown coal; lignite

Technical term for a low-grade coal; used in geology, energy, and industrial contexts.

• 褐かっ炭たんは石せき炭たんの中なかでも発はつ熱ねつ量りょうが低ひくい。

  Lignite has a low calorific value among coals.

• この地ち域いきでは褐かっ炭たんの採さい掘くつが行おこなわれている。

  Lignite mining is carried out in this region.