Practice has proved that the coal mining methods and technology to meet the recovery of the coal requirements have been successfully applied.
实践证明，该采煤方法和回采工艺满足了该煤层的回采要求，得到了成功应用。
Practice has proved that the coal mining methods and technology to meet the recovery of the coal requirements have been successfully applied.
实践证明，该采煤方法和回采工艺满足了该煤层的回采要求，得到了成功应用。
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