Some Technological Respects of Wire-Coring in Coal Drilling[J]. COAL GEOLOGY & EXPLORATION, 1986, 14(4): 57-59.
Citation: Some Technological Respects of Wire-Coring in Coal Drilling[J]. COAL GEOLOGY & EXPLORATION, 1986, 14(4): 57-59.
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Some Technological Respects of Wire-Coring in Coal Drilling

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