11867| 21
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螺栓,螺紋,螺栓孔,螺紋孔,螺紋底孔之間的關(guān)系 |
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點評
有可能他說的螺栓孔是過孔哦!
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
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