Material is removed from objects to be marked or machined by applying apertured masks having cutouts arranged in a pattern on the objects, applying a liquid mixture of abrasive particles over the masks, and then ultrasonically vibrating the mixture to propel the abrasive particles through the cutouts to transfer the pattern to the objects. A plurality of electrodes are positioned in stacked relation to form an electrode stack. When a pause release request is issued, based on the audio delay time and the frame offset time, the audio correction time to be corrected in the pause request is calculated. The drive assembly further includes a motor-driven drive wheel, and a plurality of driven wheels coupled to and driven by the drive wheel. The operator, if wishing to take a photograph of himselfherself, holds a portable cellular phone and directs a camera lens toward himselfherself, and corrects a posture of the portable cellular phone so that hisher face may be looked in such a manner that has a desired size or a desired position in the auxiliary display section operating as the mirror.