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Template:Potd/2007-04-06 (zh-hans)

应用显示内部应力分布的弹性光学方法拍摄的,用可降解的淀粉塑料制造的餐刀叉子

 Template:Potd/2007-04-06
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应用显示内部应力分布的弹性光学方法拍摄的,用可降解的淀粉塑料制造的餐刀叉子

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