addendum circle meaning in English

齿冠圆,齿顶圆
外圆

Measurement and instrument of addendum circle and dedendum circle diameter of odd tooth gears
奇数齿齿轮齿顶圆与齿根圆直径的测量及其量具
The acceptability our rejection and the depiction of some content in the course " mechanisms and machine theory " is discussed , ( e . g . , group dividing , solving steps of the graphical method for vector equation , versions and methods for analytical kinematic analysis , inversion design for linkage mechanisms , crank angle between the two limiting positions , design formulae for cam mechanisms , classification of combined mechanisms , formula of the radius of addendum circle of gear , , balancing of machinery , etc . ) and some new opinions are presented
摘要就《机械原理》课程的某些内容（如：拆杆组的方法、矢量方程图解法的解题步骤、运动分析解析法的版本和方法、连杆机构的反转法设计、极位夹角、凸轮机构设计公式、组合机构的分类、齿轮齿顶圆半径公式、机械的平衡等）的取舍和叙述进行探讨，提出一些新的看法。