tvanwho Posted December 7, 2014 Share Posted December 7, 2014 And this was 70 years ago..... 1 Link to comment Share on other sites More sharing options...
azblackbird Posted December 7, 2014 Share Posted December 7, 2014 Amazing what all goes into running a mine. The technology and engineering they had back then rivals even what we have today. Link to comment Share on other sites More sharing options...
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