“长征3号甲”是为发射新一代通信广播卫星而研制的新型运载火箭。它在“长征3号”运载火箭的基础上,采用了多项先进技术,同步转移轨道运载能力由原来的1.4吨提高到2.5吨。我国航天科技工作者倾注8年心血研制的这种运载火箭,至今发射3次,均获成功。巍巍长箭涉三关,在我国航天史上写下了一页新的篇章。 “Long March 3 A” is a new type of launch vehicle developed for launching a new generation of communications and broadcasting satellites. Based on the “Long March 3” launch vehicle, it adopted a number of advanced technologies and increased the capacity of simultaneous transfer orbit transfer from 1.4 tons to 2.5 tons. China’s space science and technology workers devoted eight years to develop this kind of launch vehicle, has launched three times, have been successful. The towering long arrow involves three levels, writing a new chapter in the history of China’s spaceflight.