楼主: ezlqs1970
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[其他相关] 刀为什么可以切断肉? |
发表于 2007-10-6 19:26
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发表于 2007-11-9 08:29
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发表于 2007-11-14 10:46
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发表于 2007-11-14 18:19
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发表于 2007-11-19 19:34
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刀刃是劈尖作用,前后拖拉是切入角非常小,阻力小嘛!
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发表于 2008-1-3 11:18
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