Gold. Astronaut visors contain 24 carat pure gold; the Gold is transparent enough for astronauts to see through and protect them from the harmful solar rays because gold prevents overheating by reflecting away infra-red radiation. http://www.belovedtreasu

Gold. Astronaut viso...

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转采于2017-03-23 16:38:39

Gold. Astronaut visors contain 24 carat pure gold; the Gold is transparent enough for astronauts to see through and protect them from the harmful solar rays because gold prevents overheating by reflecting away infra-red radiation. http://belovedtreasu

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