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一堆橡皮筋怎樣可以自動分離成一根一根的 |
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點評
1.用叉子叉,叉子間距大于防松狀態下的皮筋直徑;
2.叉子水平放置,振動,使皮筋散開(類似于曬掛面);
3.帶外齒的圓片轉動分離皮筋;
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點評 | ||
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