| 摘要 |
PURPOSE:To easily confirm dial numbers even with a more or less unsuitable angle of glance over a dial, by writing dial numbers on the bottom of finger holes of the dial. CONSTITUTION:A corresponding number 3 is written on the bottom 2 of a dial. Thus, even if an angle of glance over a dial is more or less unsuitable in dialing, since each number can easily by recognized, mis-dialing can be eliminated. Further, for visually handicapped personnel, the bottom 2 is formed shallow and braille letter can be used in place of numbers. |
