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METHOD OF LEVELLING OUT THE SLOPES OF AN OPEN MINE
METHOD OF LEVELLING OUT THE SLOPES OF AN OPEN MINE
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机译:排除露天矿山边坡的方法
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method выполаживания stepped career, including отбойку stepped and рекультивацию their surface, отличающийс so that, with a view to повышени productivity and er кономичности выполаживани ,отбойку st
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