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
TRICYCLE TX-200
On the roads of Kharkiv, there was one car with the familiar letters of the COI — "Club eternal". The automotive laboratory of the centre of scientific and technical work is headed by...
IL-4 ELECTRO
This unusual model was built by members of syt Berezniki, Perm region. Copy flies perfectly, performs such demonstrations as "flying under the 45° angle" and "pipeline." Remote speed...
