There is a close correlation between contour lines and lithology. 等值線的外形和岩性吻合的很好。
The geometrically combined relation of the syncline stucture with the pit controls the mechanical effect of the stuctural plane and rock mass structure. 向斜構造與采場的幾何組合關係控制著結構面和岩體結構的力學效應。
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