“deep hole ore blast”的概念、定义、翻译、参考文献-科学参考

单词	deep hole ore blast
释义	deep hole ore blast Encyclopedia 工学落矿释 deep hole ore blast深孔爆破落矿炮孔直径大于50毫米，孔深大于15米的爆破崩落矿石的作业。
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