3479| 4
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圖中的螺紋標注是什么樣的螺紋,看不懂 |
點評
鋸齒形螺紋現在特征代號“B"
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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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