Tag: Weathered coal humic acid

Weathered coal humic acid
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Weathered coal humic acid

Weathered coal, commonly known as outcrop coal, generally refers to products formed by the infiltration and weathering of lignite, bituminous coal, anthracite, which are close to or exposed to the surface, through air, sunlight, rain, snow, sand, and ice. China’s weathered coal reserves are abundant, according to incomplete statistics, about 100 billion . In most […]

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