The helicopter control system used to regulate the cyclic pitch change of the rotor blades.

at airport

Ball sizing, also known as ball broaching or Ballizing , is the process of forcing an oversize ball through the inside diameter of metal part. It will increase the inside diameter and greatly improve the surface texture of the part.

Rail wagon with a demountable subframe, fitted with devices for vertical handling, to allow the loading and unloading of semi-trailers or road vehicles.