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从剖视图概念和正投影原理方面，对目前使用的《机械制图》教材中列举的肋板剖视图画法的错误进行了分析，提出了正确画法，并建议国标采纳。
From the aspects of sectional view concept and orthographic projection principle, this paper analyzes the error of rib drawing method in the currently used “mechanical drawing” teaching materials, puts forward the correct painting method, and proposes to adopt the national standard.