3467| 10
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倔強的彈簧 |
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點評
應(yīng)該是某個溫度下塑性變形,,回到常溫就是彈性的了
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,,京ICP證050210號,,浙公網(wǎng)安備33038202004372號 )
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