หินตะกอน 25 ประเภทคืออะไร?
China Norwegian Hydro ใช้เทคโนโลยีการเติมแบบแห้งของแร่บอกไซต์…
It is reported that the Norwegian Hydro Company switched to the dry backfill technology of bauxite tailings to replace the previous tailings dam, thereby improving the safety and environmental protection of mining. During the testing phase of this new solution, Hydro invested approximately US$5.5...