大地线切线角 angle of geodesic coutingence
改进切线角 improved tangential angle
切角曲线 Chamfer Curve ; [数] isoptic curve ; Chamfer r Curve ; CornerCuttingCurve
弦和切线的角 angle between chord and tangent
切线夹角 angularity of tangent line
三切线内圆角 Tritangent Fillet
导程角切线 tangentofleadangle
斜切线对角线斜剖线 diagonal line
螺旋角切线 [机] tangent of helix angle
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