齐国败在只讲形式，不讲实际，连兵器也只追求美观，而秦国早早舍弃了两翼三翼箭镞，用最简单却最能量产最符合空气动力学的三棱箭镞统一了天下
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| MP4 | N/A | 480P | Download |
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| MP4 | N/A | mp4a.40.2 | Download |
| MP4 | N/A | mp4a.40.5 | Download |
| MP4 | N/A | mp4a.40.2 | Download |
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