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归纳了对称尺寸标注的两种情况,通过基准分析和尺寸链分析,得出了正确结论。同时阐明了造成错误认识的原因。
The two cases of symmetrical dimensioning are summarized, and the correct conclusions are drawn through the benchmark analysis and the dimension chain analysis. At the same time, the reasons for the misunderstanding were clarified.