n.蚶線(xiàn)(蝸牛形曲線(xiàn))
LIMACON GEAR AND CONJUGATED GEAR'S GEOMETRY ANALYSE AND SIMULATION 蝸線(xiàn)齒輪及其共軛齒輪的幾何分析與仿真
limacon of pascal 帕斯卡蚶線(xiàn)
Pascal rs limacon 利瑪松