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M20x2 中徑公差18.611-18.661應(yīng)選用哪個(gè)等級(jí)的環(huán)規(guī),? |
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Re: M20x2 中徑公差18.611-18.661應(yīng)選用哪個(gè)等級(jí)的環(huán)規(guī),?
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