Short age pushpin! Careless movement or too rigid Board and the button breaks or bends. There are many various designs of holders for posters and maps — from the simplest (e.g., dozens privernutyh to the wall with clothes pegs) to quite complex. Recommend one method of fixation. This will require a steel strip with a thickness of 1 to 1.5 mm and a width of 20-30 mm and a dozen magnets such as magnetic door latches. Steel strip fixed by screws in the upper part of the chalkboard, but to secure the poster, it is enough to apply it to the strip and to press a magnet. The paper thus securely hold the magnetic forces of darkness. I. ANASTASIEV, Moscow
Recommend to read
OBEDIENT SCREW
Many readers, building a snowmobile and a boat with propellers, in his letters to the editor are asked to tell how the variable-pitch propellers and what advantages they possess. In...
ENGINE — UNIVERSAL
To the editor of the magazine received a lot of letters in which modelers are asked to familiarize them with the device of the engine, designed by the Leningrad athlete E. Gusev. During...
