短语词组短語minor r axis 短軸minor axis of cam [機]凸輪短軸minor axis radius 短軸半逕semi -minor axis 半短軸;半短逕;短半逕minor semi -axis 短半軸;[數]短軸半逕minor axis of flexspline [機]柔輪短軸major axis minor axis 長短軸 返回 minor axis