黄金螺旋
In geometry, a golden spiral is a logarithmic spiral whose growth factor is φ, the golden ratio. That is, a golden spiral gets wider (or further from its origin) by a factor of φ for every quarter turn it makes.

Used as a source of power by [[Gyro Zeppeli]] in [[Steel Ball Run]].

h4. See also:

* [[Fibonacci sequence]]
golden spiral