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龙口矿务局因地制宜 ,提出用分区延深方式开采梁家煤矿下组煤的思路 ,不设延深水平 ,取得了投资省、工期短等良好经济技术效果
According to local conditions, Longkou Mining Bureau put forward the idea of using sub-district extension method to mine the coal under the Liangjia Coal Mine without any delay and achieved good economic and technological results with less investment and shorter construction period