The Circular -Arc-Tooth-Trace gear with double arc flank profile has the tooth trace of CATT gear and the tooth flanks profile of double circular arc gear, therefore the gear is convex-concave engaging in both flank profile and tooth trace.

• 圆弧齿线双圆弧齿轮是采用双圆弧齿轮的齿廓和圆弧齿线圆柱齿轮的齿线而形成的新型齿轮,独特的凸凹啮合齿线和凸凹啮合齿廓,使其齿面接触强度和轮齿弯曲强度都得到了很大提高,是一种应用前景十分广阔的新型齿轮。