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本作品版权归 能点燃的火柴头 所有，禁止匿名转载及个人使用，任何商业用途均需联系原作者。
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The idea is good, but there is a question, the balance car is changed to this kind, can gravity sensor feed back to the car body? Can this small wheel drive the Hall behind to turn?
The shape is a bit strange.
In proportion, there will be a feeling of worry about not being strong
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The creativity is great