classification of engineering risks
classification of engineering risks
工程风险分类
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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By using drilling in pit, ore reserve classification is increased, risks of underground mining engineering are reduced and avoided.
主要阐述了矿区通过实施坑内钻探，提高储量级别，降低和避免井下采矿工程风险，节约了成本，增加了效益。
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