<正>According to a great deal of experimental findings and the oretical analysis, theperformance of SBR process treating organic substance and ammonia was prese
<正> In discussing coal mine entry construction with rock bolt technology, examinedthe craft and machinery problems as well as the conditions in which to use ea
<正>Nano-silver/polyvinylpyrrolidone(PVP)composite materials were successfully synthesized bi-insitu from silver nitrate solution with N-vinyl pyrrolidone (NVP)
<正> In order to evaluate the safety production situation of the coal mine effectively,selected the indicators about mine production safety, applied entropy met
<正> Based on simulated material scale modeling and numerical simulation, the protective seam mining method was conducted at one coal mine. After extracting the