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词汇 急倾斜特厚煤层轻型支架放顶煤回采工艺
释义 急倾斜特厚煤层轻型支架放顶煤回采工艺 High Yield and High Efficency Stoping Technology of Light-duty Support for Caving Coal in the Steeply Inclined and Much Thicker Coal Bed
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