1685| 9
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标注尺寸后面圈了个C啥意思? |
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点评
没见过这个,我按你标题问题去网站搜也是说表示直径
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小黑屋|手机版|Archiver|机械必威体育网址 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
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