5375| 15
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圓度誤差為2A,,對(duì)嗎,? |
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點(diǎn)評(píng)
是的,。是半徑之差。但問(wèn)題是什么半徑之差,,你能夠指出來(lái)嗎,?
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點(diǎn)評(píng)
你看的這本書上面沒(méi)有關(guān)于圓度的說(shuō)法嗎,?
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