| 摘要 |
A mount portion (10) has a rectangular outside shape, and has an opening (9) in its center part that can be fitted by hanging on mounting brackets (2) fixed on a wall surface (10). An installation surface has mount fixing holes (11a,11b) in its upper part and mount fixing holes (11c,11d) in its lower part. Default positioning holes (12a,12b) are provided adjacent to the mount fixing holes. In screwing, the mount fixing holes have given screwing position freedom. The regions of the default positioning holes have smaller opening areas than the regions of the mount fixing holes. |
