uzorak (ugalj)

uzorak (ugalj)

A representative fraction of a coalbed collected by approved methods, guarded against contamination or adulteration, and analyzed to determine the nature; chemical, mineralogic, and (or) petrographic composition; percentage or parts-per-million content of specified constituents; heat value; and possibly the reactivity of the coal or its constituents.

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行业/领域：能源
类别煤; 天然气; 汽油
Company: EIA
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