| 摘要 |
PROBLEM TO BE SOLVED: To save acquiring molds for forming an illumination box or illumination cover for every different size unit room, and to easily manufacture an illumination box that agrees with the dimensions of a substandard size unit room. SOLUTION: The illumination box 10 is provided on the ceiling of a unit room, and there is installed an illumination apparatus inside of the box. The illumination box is constituted of two long-sided members 11, 12, and two short- sided members 13, 14, with the long-sided members 11, 12, being injection-formed in an approximate L-shape and cut longitudinally in a suitable length.
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