_:ne8dde82b78fa45a89677bc2f0fe9dd3dxb38
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"The quality of each coal deposit is determined by:Types of vegetation from which the coal originated.<a href='https://trike-attac.com/qa/what-is-ranking-of-coal.html#qa-how-is-quality-of-coal-measured'>figure out</a>"
<https://trike-attac.com/qa/what-is-ranking-of-coal.html>