4877| 12
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焊縫車加工下好還是不車好呢。 |
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點(diǎn)評(píng)
是啊,很多管子接頭就是類似的
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點(diǎn)評(píng)
同意,不開(kāi)坡口強(qiáng)度達(dá)不到。
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