The article introduces research and application situation of solvent deasphalting - deoiling asphalt gasification - deasphalting oil FCC group technology. 介绍了渣油溶剂脱沥青 - 脱油沥青气化 - 脱沥青油催化裂化组合工艺的研究及应用情况.
Observers have recently found in the Universe giant voids about 500,000,000 light-years across.观察员最近在宇宙中发现了直径约5亿光年的巨型空洞。Some military observers fear the US could get entangled in another war.一些军事观察家担心美国会卷入另一场战争。Internati...