Figure 1
Location of the C2 coal seam and sampling ___location in the Fengfeng mine of the Handan Coalfield, Hebei Province (Dai and Ren, 200710).
Figure 1 | Scientific Reports
Location of the C2 coal seam and sampling ___location in the Fengfeng mine of the Handan Coalfield, Hebei Province (Dai and Ren, 200710).
