Regarding cover rock space as huge system complex medium, the layerdiscrete duality medium model is established.

将采场上覆岩体视为大系统复合介质,建立层状-离散二重介质模型.

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National Association ofCommerce of China's non - public economic institutions speak, have their own a huge system resources.

全国工商联是我国 非公经济 代言机构, 本身拥有着庞大的系统资源.

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