
At 2.1 kilometres, Resolution Copper’s No. 9 shaft is currently the 2nd inmost lift mine shaft in the United States
.
发布者:Dr.Durant,转转请注明出处:https://robotalks.cn/sunk-cost-resolution-completes-200m-shaft-extension/

At 2.1 kilometres, Resolution Copper’s No. 9 shaft is currently the 2nd inmost lift mine shaft in the United States
.
发布者:Dr.Durant,转转请注明出处:https://robotalks.cn/sunk-cost-resolution-completes-200m-shaft-extension/