【正确答案】Carding actions are determined by the following factors: (1) The relative direction of movement of the roller surfaces; they may either move in the same direction, or in opposite directions. (2) The direction of inclination of the card clothing pins, this may be points leading or backs leading. (3) The relative surface speeds of the points of the card clothing. (4) The distance between points on the adjacent parts, this distance is called the setting.