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すみひろ～＠うちゅう @sumihiro_sakaki Follow

Model Rocket Engine In A Vacuum Chamber - 4K Slow Motion - will it burn?
youtu.be/GxBRQXxBRic

真空容器中のもあった

エステス アルファー３ ランチセット
amzn.to/2rs6sVB

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