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關(guān)于螺紋孔底孔的問(wèn)題 |
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點(diǎn)評(píng)
下了,,不過(guò)好多資料�,。】刹豢梢院�(jiǎn)單明了的回答一下他說(shuō)的到底對(duì)還是不對(duì)呢,?
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點(diǎn)評(píng)
這個(gè)應(yīng)該是準(zhǔn)確的吧,?十分感謝!�,。,。�,!
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