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崩风筒的主要施及结构、应用原理、采用这项的具体作方法及达到的预期效果。
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崩风筒的主要施及结构、应用原理、采用这项的具体作方法及达到的预期效果。
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