non-principal axis (NPA) rotational motion jonbeš-e carxeši be gerd-e âse-ye nâ-farin Fr.: mouvement rotationnel autour de l'axe non-parincipal A → tumbling motion of an → asteroid. See also → tumbling asteroid. → non-; → principal axis; → rotational; → motion. |
rotational motion jonbeš-e charkheshi Fr.: mouvement de rotation Of a → rigid body, a motion in which there are always two points of the body which remain motionless. → rotational; → motion. |