| 摘要 |
PROBLEM TO BE SOLVED: To provide an execution level structure having a good appearance, enabling effective use and capable of keeping a groove clean even if it is used in a place requiring drainage, in the execution level structure having the grooves as a hollow section in the back side of a face material. SOLUTION: The execution level structure is constituted by forming an opening section 6 in a gap between face materials 4 and 4 adjacent to each other and providing a fluid passages 5 (5a and 5b) connected with the front sides of these face materials through the opening section 6 along the longitudinal direction of the opening 6 to the back sides of the face materials 4, and it is so constituted that a width A along the short direction of the opening 6 becomes smaller than a width along the short direction of the fluid passage 5 (5a and 5b). Accordingly, for the width, since the opening 6 is narrower than the fluid passage 5 (5a and 5b), the fluid passage 5 (5a and 5b) can not be easily visible through the opening 6 from the outside of the execution level. COPYRIGHT: (C)2006,JPO&NCIPI
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