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
MAZ-525
Model MAZ-525, as well as any car-truck, fun to do with the current mechanism of tipping. This obliges to elaborate the details of all devices under the bottom and found when the body is...
INSTEAD OF SPLIT
For reliability of bolted connection in terms of vibration under the nut usually enclose a split spring washer: its sharp edges prevent the loosening of fasteners. If any washers at...
