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METHOD OF MINING THICK STEEP ADJONING COAL SEAMS PRONE TO ROCK BUMPS AND SUDDEN GAS AND COAL OUTBURSTS
METHOD OF MINING THICK STEEP ADJONING COAL SEAMS PRONE TO ROCK BUMPS AND SUDDEN GAS AND COAL OUTBURSTS
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机译:煤层易爆,突突瓦斯和煤层突出的厚煤层开采方法
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摘要
a way to develop a very strong сближенных coal seam prone to mount attacks and accidental emissions of coal and gas, including the forth seizure ver хнего сло protective stratum.drilling in the между
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