págs. 22-26
Longwall mining thrives in Colorado's North Fork Valley: With mining units poised for record-setting capacity and rail service restored, these mines are ready to cut coal
págs. 28-34
OEM unveil new ideas for shovels & excavators: From upgrades to new loading arrangements, vendors are looking at new ways to optimize the production process
Steve Fiscor (ed. lit.)
págs. 39-42
págs. 46-47
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