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
GEAR -SAW…
Somehow I had the need to cut a thin sheet of plastic. Due to its large size, use the hacksaw was impossible, but to cut just the canvas for a long time, and breaks it in his hands....
MODEL-A COPY OF CHAMPION
In the laboratory, missile and space modeling of the Moscow city Palace of children's (youthful) creativity of the work on the creation of models-copies of the booster (PH) "Soyuz" was...
