| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a display plate low in cost without needing a power source and requiring no time for installation. <P>SOLUTION: The display plate is formed of metal and kept thin to eliminate the necessity to dig deep when installed. Recessing and projecting work is performed to the surface of the metal plate to form a guide mark (a guide mark forming part 0601), and a light storage type phosphor 0604 is applied to a recessed part to ensure visibility in a dark place. <P>COPYRIGHT: (C)2007,JPO&INPIT |
