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What goes up must come down(图)
rests surface area
2014/12/1
RIVERSIDE, Calif. — Found in warm regions of the world, geckos are extremely capable of climbing up steep, smooth surfaces. To do so, they employ an adhesive system — a key evolutionary innovation tha...
NASA Launches New Technology: An Inflatable Heat Shield
NASA Technology An Inflatable Heat Shield
2009/8/20
A successful NASA flight test Monday demonstrated how a spacecraft returning to Earth can use an inflatable heat shield to slow and protect itself as it enters the atmosphere at hypersonic speeds.
全球首架电池驱动飞机成功升空 飞行391米(图)
电池驱动的人手驾驶飞机 硷性干电池 东京工业大学 神谷友广
2006/7/19