sluse conchoid斯吕塞蚌线
conchoid bodies甲状小体
hyperbolic conchoid[数] 双曲蚌线;双曲螺线
conchoid d蚌线
elliptic conchoid[数] 椭圆蚌线
circular conchoid圆蚌线
parabolic conchoid[数] 抛物蚌线
N（名词） a plane curve consisting of two branches situated about a line to which they are asymptotic, so that a line from a fixed point (the pole) intersecting both branches is of constant length between asymptote and either branch. Equation: (x – a)²(x² + y²) = b²x² where a is the distance between the pole and a vertical asymptote and b is the length of the constant segment 蚌线 [geometry]