column
1999, 27(1): 1-3.
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1999, 27(1): 4-6.
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1999, 27(1): 7-9.
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CHARACTERISTICS OF COAL FACIES AND WASHABILITY OF THE MAIN MINABLE COAL SEAMIN WUDA COAL MINING AREA
1999, 27(1): 10-12.
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1999, 27(1): 13-16.
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1999, 27(1): 21-23.
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1999, 27(1): 23-26.
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1999, 27(1): 26-28.
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1999, 27(1): 29-32.
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1999, 27(1): 32-35.
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1999, 27(1): 36-39.
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1999, 27(1): 39-41.
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1999, 27(1): 42-44.
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1999, 27(1): 45-48.
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1999, 27(1): 48-51.
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1999, 27(1): 52-54.
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1999, 27(1): 55-59.
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1999, 27(1): 60-63.
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1999, 27(1): 64-68.
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1999, 27(1): 69-71.
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