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請(qǐng)問(wèn)下各位這個(gè)圓管拍扁的尺寸是如何得來(lái)的有計(jì)算方式不 |
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點(diǎn)評(píng)
對(duì)就對(duì),錯(cuò)就錯(cuò),不必勉強(qiáng),如果需要做到26mm,那R=2.7mm。
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