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美国NASA依靠巨型土星Ⅴ运载火箭,达到了人类登月的目的。社会上普遍把这种火箭当作现代技术的顶峰,说它非凡地综合了超出大多数人的认识的最新科学和技术成就。不过,工程师们更重视这种巨型火箭的演变过程。本文涉及了研制三级土星Ⅴ运载火箭的S-ⅣB级的演变历史。S-ⅣB曾作过二级土星1B火箭的第二级,而S-ⅣB的前身S-Ⅳ级是土星Ⅰ火箭
NASA, the United States, relies on the giant Saturn V carrier rocket to reach the purpose of mankind’s landing on the moon. This rocket is generally regarded as the culmination of modern technology in society by saying that it is an extraordinary synthesis of the latest scientific and technological achievements that go beyond most people’s understanding. However, engineers pay more attention to the evolution of this giant rocket. This article deals with the history of the evolution of the S-IVB stage of developing a three-stage Saturn V carrier rocket. S-IVB has been the second stage of the second-stage Saturn 1B rocket, and the predecessor of the S-IVB is the Saturn I rocket