俄公布质子号发射失败原因由俄政府组织的一个事故调查委员会已做出结论，指出１９９３年５月２７日四级型质子号运载火箭发射失败的原因是推进剂严重污染。在这次发射失败中被毁的有效载荷是俄政府的一颗地平线通信卫星。最初新闻媒介曾报道说是火箭的上面级出了问题，并... Russia announced proton launch failure reasons An accident investigation commission organized by the Russian government has concluded that the May 27, 1993 four proton carrier launch failed due to serious propellant contamination. The payload destroyed during the launch failed as a horizon communications satellite of the Russian government. The original news media reported that it was a rocket above the level of a problem, and ...