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Coal - bearing strata in the Wangguanzhuang exploration area belongs to Permo - Carboniferous North China type coal - bearing formation.
王官庄探区含煤岩系为石炭—二叠系,属华北型含煤建造,煤系厚度稳定,旋回结构与粒度韵律清晰,且变化有一定规律.
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It's very important for coal mining to find out small geological structure in coal bearing formation.
查清煤系地层中的小构造对于煤矿开采十分重要.
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