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The ash matter of coal is one of main effect factors in various coal researches.In this paper, five methods of acid washing to deash coal were studied.

在对煤各类研究,灰分是不可缺响因素之一。

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intragroup, intragyral, intrahepatic, intrain, intraindividual, intra-intestinal, intraisland, intra-issue, intrait, INTRALAB,

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3G, 401(K), a,

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