公猪 发表于 2025-3-28 17:35:32
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V. I. Bulatov,I. N. Rotanova,D. V. Chernykhny attempts were made to define a feasible human mission to Mars. Development of nuclear thermal propulsion (NTP) began in the 1950s and 1960s. In 1968, Boeing published a detailed design of a human mission to Mars making extensive use of NTP. The Boeing 1968 study set a high bar for extraordinary dAGONY 发表于 2025-3-29 16:44:07
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M. Ajmal Khan,Benno Böer,Hans-Jörg BarthNew information on salt desert ecosystems in many countries, valuable for researchers, and developers.Essential information for developers and researchers for professional R and D planning.Sabkha Ecos无法破译 发表于 2025-3-30 06:22:56
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