3138| 7
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如何測量這樣的長度,? |
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點評
關(guān)鍵是像我說的那樣,,都在公差范圍內(nèi),都可以用,。分段磨削,兩端公差大,,中間公差小,,還不如一個公差,都用小的,,光軸更好加工
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