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PT1/4到底是個什么螺紋! |
點評
生產中實際遇到的嗎,可以貼個圖,我也學習學習。
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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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