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SHIELD FOR DRIVING HORIZONTAL MINE WORKING THROUGH FROZEN ROCK
SHIELD FOR DRIVING HORIZONTAL MINE WORKING THROUGH FROZEN ROCK
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机译:通过冻结岩石驱动水平矿井的防护罩
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摘要
the invention относитс to the mining industry and is дл сооружени mines in very complex geological услови х щитовым way. purpose to drive productivity falls by обеспечени aimed перемещени shield.
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