Research Article
Nuclear Magnetic Resonance Study on Microstructure and Permeability of Coals of Different Ranks
Figure 9
Low temperature liquid nitrogen adsorption curve of coal sample and pore size distribution curve of coal sample. (a) XJ-1, (b) XJ-2, (c) HB-1, (d) HB-2, (e) ZM-1, and (f) ZM-2.
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