
How often in the lectures or lessons on a stand, posters and other visual AIDS? Of course, stationery buttons! In recent years, however, they comes to the aid of sticky tape. However, neither one nor the other can not be called gentle fixtures — they spoil what keep. Universal and yet does not harm the posters device can be made of conventional rails. Connect the three strips of different width so that between them formed a groove — it will hold, for example, maps: it is enough to jam the cut sheet of rubber or conventional eraser wedges; and the — beveled fourth rail.
Recommend to read
DOUGLAS A20 BOSTON
American Douglas aircraft company was founded in 1921 by aircraft Donald Wills Douglas. Among the first aircraft issued by the firm were the torpedo bombers, passengers, mail and...
DROWN TO CONNECT
If the fastening of wooden parts and the screw will be less than their thickness, drill the recess with a diameter of under his hat, and the screw will "pull" to the second part,...