2964| 5
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平均收縮機構怎么畫? |
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點評
用同規格,同長度彈簧,利用同等的力,彈簧壓縮量相等的原理,
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點評 | |
小黑屋|手機版|Archiver|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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