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關(guān)于螺紋孔底孔的問題 |
點評
下了,不過好多資料啊!可不可以簡單明了的回答一下他說的到底對還是不對呢?
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點評
這個應(yīng)該是準(zhǔn)確的吧?十分感謝!!?。。?nbsp;
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