22952| 55
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懂焊接的進(jìn)(一個(gè)困擾和很久的問題) |
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點(diǎn)評(píng)
應(yīng)該是寬度,,v型坡口的寬度,,板厚應(yīng)該是已知,給出寬度可以知道角度,。
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