The surface composition and electronic structure of tungsten carbides prepared by directsynthesis and carburization of white tungstic acid were studied with x-
Given previous research and prototypical geological conditions of a mining workface,we simulated fis-sure development in clay layers at the bottom of Quaternary
Hydro-chemical characteristics of groundwater and their changes as affected by human activities were studied in the Ejin Sub-Basin of the Inner Mongolia Autonom