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坑探工程
tech. exploratory tunneling engineering; tunnel exploration engineering
坑探工程为达到地质勘探的目的、了解岩性和地质构造、矿体的赋存情况、寻找有用矿床，在地表或地下岩层中挖掘各种不同形状的空间场所
expl. opencasting exploration engineering
坑探工程
: 7 phrases in 1 subject
Technology7

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