steel door; wooden door; aluminum door; security door; glass door; fireproof door; bulletproof door; blastproof door;
防盗门;玻璃门;木门;金属门;其他门窗五金;自动门;
steel door; wooden door; aluminum door; security door; glass door; fireproof door; bulletproof door; blastproof door;
防盗门;玻璃门;木门;金属门;其他门窗五金;自动门;
The technical measures and structure,applied principles of blastproof of ventilation shaft at excavating face,specific operational method and prospective effect are described.
介进工作面防炮崩风筒主要技术措施及技术构、应用原理、采用这项技术具体操作方法及预期效果。
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