10 mineable coal seams in Inner Mongolia
behavior characteristic of coal in furnace
Correlation of Coal Seams
erosion zones in coal seams
lower group of coal seams
Mercury in coal of China
overlying strata of upper coal seam
permeability of coal seams
trace elements in coal of China
water infusion in coal seams
formation of coal-field in North-eastern China
cause of formation in the river pattern
Bitao Formation of Upper Cambrian Series
Linxi formation of Upper Permian
the upper member of Guantao Formation