2469| 6
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螺紋滾絲后產(chǎn)生毛坯的原因? |
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點評
沒干 過別亂扯蛋,技術(shù)問題,一定要你自己干 過,才回答,還要保證你回答的是正確的,
百度的東西,技術(shù)類的,多是錯的,
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