变径基圆渐开线
base circle involute with changing radius
标准渐开线直齿轮
standard Involute spur gear
标准渐开线直齿圆柱齿轮
standard involute cylinder gear
齿轮渐开线及螺旋角测量仪
involute and helix measuring instrument
电感记录式单盘渐开线测量仪
single-disk involute measuring instrument with recorder
反渐开线函数
inverse involute function
非对称渐开线直齿轮
asymmetrical involute spur gear
风叶轮渐开线
fan impeller involute’s lineament
复合抛物面和渐开线反射面
compound parablic and involute reflector