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来源:雅诚德英语网
Absrtact: in recent years, the ramps have been used more widely in the deposit discovery, the reasonable design of the ramps has important significance for engineering practice.
摘要:近年来,斜坡道在矿床开拓中得到越来越广泛的应用,合理的斜坡道设计,对工程实践具有重要的意义。