樓主: 715840386
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求助:鈑金折彎處加強(qiáng)筋的作用 |
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點(diǎn)評(píng)
這種都是非標(biāo)的,因?yàn)榧訌?qiáng)筋都是設(shè)計(jì)定的,。
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