| 摘要 |
PROBLEM TO BE SOLVED: To form simply a ceiling panel by eliminating the coupling works in the ceiling. SOLUTION: A folded part 7a is formed at one of the edges of one ceiling panel unit 7A, and another ceiling panel unit 7B adjacent to the first one 7A is equipped at one edge with a folded part 7b to which the first folded part 7a can be fitted. Thereby the two panel units 7A, 7B are coupled together by fitting the matched folded parts mutually. |
