哪位老大给看看,NTRS的网站上怎么查不到下面三篇文章?
所有跟贴·加跟贴·新语丝读书论坛
送交者: ziren 于 2013-05-09, 12:21:52:
同学转来的文献求助。
1. Valkema D C.Umbilical connect techniques improvement technology study,NASA 10-7702[r].USA:NASA,1972.
2. Dandage S R,Herman N A,Godfrey S E,et al.Design and development of the space shuttle tail service masts,NASA 79-21357[r].USA:NASA,1979.
3. Uda R T.Space shuttle tail service mast concept verification,NASA 76-28273[r].USA:NASA,1976
所有跟贴:
加跟贴