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环球猎奇🏅 1y ago

这就是为什么火车车轮不是完美的圆柱形，而是略微呈圆锥形的原因。

[视频：3d_printer_academy] https://t.co/FdI1MuoE28 https://video.twimg.com/ext_tw_video/1735087039668760576/pu/vid/avc1/576x1022/WQ9UTgpJqTrrLnL9.mp4?tag=12

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