Roulette (curve) application of this is that a square wheel could roll without bouncing on a road that is a matched series of catenary arcs. Roulette (curve) In the differential geometry of curves, a roulette is a kind of curve, generalizing cycloids, epicycloids, hypocycloids, trochoids, and involutes. Roughly speaking, a roulette is the curve described by a point (called the "generator" or "pole") attached to a given curve as that curve rolls without slipping, along a second given curve that is fixed. More precisely, given a curve attached to a plane which is moving so that the curve rolls, without slipping, along
Rolling stock of the South Manchuria Railway etc. of a given wheel arrangement. This was followed by a unit serial number in Roman numerals. The first two katakana indicated the wheel arrangement, derived from the American naming system: Self-moving rolling stock powered by something other than steam used a different system, which indicated the type of powerplant. Railway cranes were also classified like this. The third katakana in the class name was the class number, derived from the first syllable of the corresponding Japanese number: When the operation and management of the Manchukuo National Railway and of the North China Transportation Company were transferred to Mantetsu, their