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找出一张长方形的纸张,质地要稍硬。
![](https://iknow-pic.cdn.bcebos.com/faf2b2119313b07e6483c8fd07d7912397dd8c0d?x-bce-process=image/resize,m_lfit,w_600,h_800,limit_1)
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将纸张横向铺开并将左右两头对折。将折叠后所得的那面上下对折。将纸张打开一面,以第二次对折所留下的折痕印为中心线,将纸张的两角各向中间折叠。
![](https://iknow-pic.cdn.bcebos.com/a50f4bfbfbedab643f33d535fc36afc378311e85?x-bce-process=image/resize,m_lfit,w_600,h_800,limit_1)
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将纸张全部摊开,我们将会看见纸张的中间有着沙漏形状的折痕印。
![](https://iknow-pic.cdn.bcebos.com/f31fbe096b63f624e41ea1f68c44ebf81b4ca380?x-bce-process=image/resize,m_lfit,w_600,h_800,limit_1)
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分别沿着沙漏形状的两条交叉的折痕印将纸张对折,对折突出来的棱线必须在同一面上。
![](https://iknow-pic.cdn.bcebos.com/d1a20cf431adcbefcd90e6f3a7af2edda2cc9f9b?x-bce-process=image/resize,m_lfit,w_600,h_800,limit_1)
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把折得的两条交叉的棱线的中线往里折。
![](https://iknow-pic.cdn.bcebos.com/a5c27d1ed21b0ef4074900abd6c451da80cb3ea5?x-bce-process=image/resize,m_lfit,w_600,h_800,limit_1)
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将突出来的两面压平。把左右两个边角分别向中间的折痕印折叠。。
![](https://iknow-pic.cdn.bcebos.com/96dda144ad34598204057d6707f431adcaef84bc?x-bce-process=image/resize,m_lfit,w_600,h_800,limit_1)
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继续将左右两边最下面的两个边角分别沿着两个三角形的底边向外折叠。
![](https://iknow-pic.cdn.bcebos.com/9e3df8dcd100baa1c1b0df4e4c10b912c9fc2ea2?x-bce-process=image/resize,m_lfit,w_600,h_800,limit_1)
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将上一步折得的边角向上翻并包住三角形的斜边。
![](https://iknow-pic.cdn.bcebos.com/78310a55b319ebc4f382ee6c8926cffc1f171648?x-bce-process=image/resize,m_lfit,w_600,h_800,limit_1)
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压平。
![](https://iknow-pic.cdn.bcebos.com/00e93901213fb80ebd4af9223dd12f2eb83894a8?x-bce-process=image/resize,m_lfit,w_600,h_800,limit_1)
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将纸盒子打开即可装东西。
![](https://iknow-pic.cdn.bcebos.com/42a98226cffc1e17c33f14c44190f603728de947?x-bce-process=image/resize,m_lfit,w_600,h_800,limit_1)