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3×12冷拉Q235-A材料在120°彎曲后,鉆φ4孔進行鉚接,發現有斷裂現象---求助 |
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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