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旧 Apr 16th, 2009, 09:56     #12
Dinos
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默认

在考虑吸能效果的情况下,结论就完全不同。

车的自重和材料硬度起到了决定性的作用。撞击方向次之。不能简单的以“大”或“小”来衡量。

斧子为什么可以劈柴?
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