The kaolinite tonstein in the seam 5# is formed by acidic ash alterated in the acid medium in peat bog in tongchuan district.
铜川矿区5#煤层中的高岭石泥岩夹矸是由性火山灰在近地表的成煤条件性淋、而成的。
The kaolinite tonstein in the seam 5# is formed by acidic ash alterated in the acid medium in peat bog in tongchuan district.
铜川矿区5#煤层中的高岭石泥岩夹矸是由性火山灰在近地表的成煤条件性淋、而成的。
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