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METHOD OF WORKING GENTLY-SLOPING THIN COAL BED WITH UNSTABLE SIDE ROCK
METHOD OF WORKING GENTLY-SLOPING THIN COAL BED WITH UNSTABLE SIDE ROCK
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机译:边坡不稳定开采薄煤层的方法
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摘要
way to the development of thin coal-bed is unsustainable and breeds in бремсберговой part of coal mine пол , включаюш.s the core of central and фланговых inclined faces, русных выемочных штреков, нис
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