对称图形 meaning in English

symmetric figure
symmetrical figure

When an object shape is nearly symmetrical and the non - symmetrical part has been shown clearly by other views , it could be drawn by half - section
可将投射方向一致的几个对称图形各取一半（或四分之一）合并成一个图形。此时应在剖视图附近标出相应的剖视图名称。
Abstract : this paper intnoduces the means of wedm based on gnand command for altenating of the sysnmetrg figares , and explanins the steps and skills of he cutting . routes programming combining the particular part
文摘:介绍了基于对称图形变换宏指令的低速走丝线切割加工方法，并结合具体零件切割路径的编程步骤及技巧予以说明。
This paper presents an study on the interior orientation techniques in computer vision , and proposes a collimation mark recognition algorithm which applies to practicality images on barycenter of symmetrical figure
介绍了对计算机视觉中数字影像的内定向技术的进一步研究，对现有框标识别方法进行了改进，提出了基于对称图形重心的框标自动识别方法