It is concluded that the rock mass structure has a not negligible influence when a quality threshold has to be set for a tunnel blasting operation;
研究表明，在必须为隧道爆破作业规定质量参数临界值时，岩体构造有不可忽视的影响。
It is concluded that the rock mass structure has a not negligible influence when a quality threshold has to be set for a tunnel blasting operation;
研究表明，在必须为隧道爆破作业规定质量参数临界值时，岩体构造有不可忽视的影响。
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