研究结果的应用，已取得了较好的技术经济效益，对水力采煤矿井的生产实践具有一定的指导意义。
The application of obtained results yielded good technological and economical benefits and has a guiding significance to the production practice of hydro -mechanized mine.
研究结果的应用，已取得了较好的技术经济效益，对水力采煤矿井的生产实践具有一定的指导意义。
The application of obtained results yielded good technological and economical benefits and has a guiding significance to the production practice of hydro -mechanized mine.
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