The technical measures and structure,applied principles of blastproof of ventilation shaft at excavating face,specific operational method and prospective effect are described.
介绍了掘进工作面防炮的主要技术措施技术结构、应用理、采用这项技术的具体操作方法的预期效果。
The technical measures and structure,applied principles of blastproof of ventilation shaft at excavating face,specific operational method and prospective effect are described.
介绍了掘进工作面防炮的主要技术措施技术结构、应用理、采用这项技术的具体操作方法的预期效果。
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