medium and deep hole blasting
medium and deep hole blasting
中、深孔爆破
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Serial blasting crater test method was used in underground medium and deep hole mining of Dahongshan copper mine for determining drilling and blasting parameters, and good results were obtained.
大红山铜矿地下中深孔采矿中，采用系列爆破漏斗试验方法确定中深孔采矿凿岩爆破参数，取得了较好的效果。
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