12466| 25
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誰能設計一個摘花生的機器 |
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點評
成熟花生是長在地下的,需要先把花生從地下連根一塊挖出來,才能從花生根上摘下來
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Archiver|手機版|小黑屋|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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