Therefore, the mining technology of the permanent waterproof jambs in Kangjiawan Mine is entirely feasible using the backfilling method with the parameters above.

 
  • 因此,在满足以上研究参数条件下,采用充填法对康家湾永久防水矿柱进行回收是完全可行的。
今日热词
目录 附录 查词历史