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The lower limit of oxygen concentration of coal under different air leakage intensities.
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The lower limit of oxygen concentration of coal under different air leakage intensities.
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The lower limit of oxygen concentration of coal under different thicknesses of residual coal.
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The lower limit of oxygen concentration of coal under different thicknesses of residual coal.
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The lower limit of oxygen concentration of coal under different air leakage intensities.
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The lower limit of oxygen concentration of coal under different thicknesses of residual coal.
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The lower limit of oxygen concentration of coal under different thicknesses of residual coal.
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The lower limit of oxygen concentration of coal under different thicknesses of residual coal.
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The lower limit of oxygen concentration of coal under different thicknesses of residual coal.
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