The improved technique of chamber blasting is beneficial to the extending of its scope of applications, and provided references for the similar engineering.
这种改进的硐室爆破技术有利于扩大其适用范围，对同类工程具有参考价值。
The improved technique of chamber blasting is beneficial to the extending of its scope of applications, and provided references fo…
这种改进的硐室爆破技术有利于扩大其适用范围，对同类工程具有参考价值。
The improved technique of chamber blasting is beneficial to the extending of its scope of applications, and provided references fo…
这种改进的硐室爆破技术有利于扩大其适用范围，对同类工程具有参考价值。
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