4564| 4
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三视图投影中切线的困惑 |
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点评
谢谢层主的资料,图片很好。但我说的槽钢不属于这一类。楼主可否抽空画个槽钢的三视图,贴上来?
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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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