长征三号安全可靠性又有提高本刊讯据了解，去年长征三号运载火箭发射中星七号卫星时，火箭发动机提前关机，未能将卫星送入预定轨道的事故原因已查明。长征三号火箭已经采取了一系列改进措施，其有效性已通过地面试验的验证。这说明我国长征三号运载火箭在安全可靠性方面... It is understood that the launch of Long March III carrier rocket in the Star on the 7th satellite, the rocket engine shutdown in advance, failed to satellites into the scheduled orbit the cause of the accident has been identified. Long March III rocket has taken a series of improvement measures, its effectiveness has been verified by ground tests. This shows that China’s Long March III launch vehicle in terms of safety and reliability ...