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在密閉的膠囊里,如何將行程大小轉化為數字信號,那種方法可靠、經濟 ? |
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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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