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It is of directive signification for choose roadway support forms of deep mining and support parameters for Xinw...
对新汶矿区深部煤巷支护形式的和支护参数的选择具有一定的指导意义。
youdao
-
It is of directive signification for choose roadway support forms of deep mining and support parameters for Xinw...
对新汶矿区深部煤巷支护形式的和支护参数的选择具有一定的指导意义。
youdao