亚洲网紅露点

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  • 亚洲网紅露点 comparison: anthracite vs. bituminous coal

anthracite vs. bituminous coal

anthracite

noun

  1. a mineral coal containing little of the volatile hydrocarbons and burning almost without flame; hard coal.

bituminous coal

noun

  1. a mineral coal that contains volatile hydrocarbons and tarry matter and burns with a yellow, smoky flame; soft coal.