2480| 9
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標注尺寸后面圈了個C啥意思? |
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點評
沒見過這個,我按你標題問題去網站搜也是說表示直徑
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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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