Characteristics of Quenching Zone with Plasma Beam for Cast Iron
zhang lei; cui hong zhi; yin hua yao; liang yu hai; yu xiao chun (1.college of mechanical and electronic engg; sust; taian 271019; china; 2.ltd.of zhongyuan oil machinery; puyang henan 457331; china)
Numerical Simulation Analysis of Deep Roadway's Stability in Compound Stress Field
kong de sen 1; 2 ; jiang jin quan 2; fan zhen zhong 3; zhang lei xin 3 (1.department of civil engineering and architecture; dalian university of technology; dalian 116024; china; 2.college of resources and environmental eng.; sust; taian 271019; china
A Discussion on Grey Planning of Coal Exploitation in Mining Area
lin qi ning 1; wu de xiong 2; yang zhi xiong 1 (1.dept of environmental and resources eng; fuzhou university; fuzhou; fujian 350002; china; 2.yongding mining admin.longyan; fujian 364000; china)