By analysing geological exploration informations for Lishi coal mine area,combining mining conditions,discusses the reliabllity of 4 # seam resources,and 4 # seam mixed mining 10 # seam.
英
美
-
-
通过对离石矿区的地质勘探资料的分析,结合实际开采情况,论证了4%23煤层的资源可靠性及与10%23煤层配采的可靠性及配采方案。
以上内容独家创作,受著作权保护,侵权必究
海词词典,十七年品牌