| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an underground guiding light device with which the position of stairs leading an exit can easily be recognized, when a disaster occurs at a place where sunlight does not reach, such as an underground railway or an underground shopping area and power transmission is cut off. <P>SOLUTION: A guiding light 3 lighting when an underground atmosphere darkens, is buried into a vertical wall surface 2 of the lowest step 1 on the stairs S from the underground railway or underground shopping area to the ground. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
