5436| 13
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這兩種材料如何粘結 |
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點評
接觸面積1平方厘米,受力約1.5kg
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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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