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发表于2024-11-13
Amazing Air Racers pdf epub mobi txt 电子书 下载 2024
What makes an air-racer go? Explore the science behind electricity, electromagnets, and propellers while building two fun racecars! Race yourself or your friend on the gravity-defying racetracks, tunnels, and homemade roller-coaster ramps described in the book. Or make an amazing air-racer course of your own!
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Amazing Air Racers pdf epub mobi txt 电子书 下载 2024