煤矿开采资料的积累和总结是对煤田地质勘探工作的最好检验和促进。
The accumulation and summary of coal mining geologic information arc the best testing and a promotion to the coal geologic prospecting work.
煤矿开采资料的积累和总结是对煤田地质勘探工作的最好检验和促进。
The accumulation and summary of coal mining geologic information arc the best testing and a promotion to the coal geologic prospecting work.
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