8028| 8
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槽鋼點接觸和面接觸哪個受力好,差很多嗎 |
點評
大俠給個示意圖,拜謝
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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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