+-----++-----++-----+
| 7 || 6 || 5 |
+-----++-----++-----+
+-----++-----++-----+
| 8 || 9 || 4 |
+-----++-----++-----+
+-----++-----++-----+
| 1 || 2 || 3 |
+-----++-----++-----+

パネルとアームの重みだけで机がひっくりかえりそうだね!!