2746| 11
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不花您5毛錢,只需您5分鐘,快速了解沉孔標注與解釋,還愁啥? |
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點評
是GB不是JB, GB/T4458.4,GB/T16675.2與ASME14.5.
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點評
機械群里高手如云
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Archiver|手機版|小黑屋|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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