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Eight jacking towers lifted a 6.8 million pound dragline clear of a Queensland mine floor and set it down on wheels, and the machine crossed 16.7 miles of pit in ten days instead of walking for a month
1+ week, 8+ hour ago (822+ words) A dragline this size has no wheels at all. It rests on a round steel tub, and it moves by lifting part of its own weight onto two shoes, shifting, and setting itself back down. One cycle covers a few…...