... aft ramp 后调节板 ramp mining 斜坡道开采; 缓坡开采法 ramp rail 坡接轨 ...
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... 横坑开采法 drift (adlt) mining; drift（adlt）mining 缓坡开采法 ramp mining 阶段开采法 bank method of attack ...
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mining panel ramp 盘区斜坡道
·2,447,543篇论文数据，部分数据来源于NoteExpress
"We are working to build a ramp to keep on removing the rubble from the collapse, " regional mining secretary Mauricio Pino Sid said on Twitter.
BBC: Chile slow search for miner trapped 100m underground
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