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METHOD OF EXCAVATING UNCOHESIVE WATER-SATURATED ROCK FROM PRODUCING LEVELS
METHOD OF EXCAVATING UNCOHESIVE WATER-SATURATED ROCK FROM PRODUCING LEVELS
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机译:从生产层开挖非硬质水饱和岩石的方法
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the invention относитс to geology, mining and construction case and the river neb, used in the гидравличес™ com извлечений несв заньгх водонасы - щенных species. objective повьшение efficacy and safe
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