centring, center adjustment
adjusting, in a plane perpendicular to the axis of rotation, the position of the centre point of the workpiece to be coincident to be the axis of rotation of the instrument, pöörleva mõõteobjekti keskpunkti asendi reguleerimine pöörlemisteljega risti asetseval tasapinnal, et see langeks kokku mõõtevahendi pöörlemisteljega