For the sake of a more accurate shel boundary and calculation of radiation heat transfer in the Directional Solidiifcation (DS) process, a radiation heat transf
The density of vacuum counter-pressure cast aluminum alloy samples under grade-pressuring condition was studied. The effect of grade pressure difference and tim
The intational market share and economy benefits of ZPEB (Zhongyuan Petroleum Exploration Bureau, Sinopec ) are presenting an unprecedented development tendenc