7802| 16
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螺紋打孔 |
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點評
恩,方法都差不多,只要沉頭孔與螺釘頭的配合間隙不干擾過孔與螺紋孔的配合間隙即可。
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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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