if you tighten the window with gauze or a special plastic grid sold in hardware stores— is well known. However, the existing methods of their attachment^and frame, I think, is far from perfect. Offer their own, the most convenient option. You need to bind the grid stripe “thistles”, and on the outside of the frame to secure with small nails or glue counterpart of this clasp. This method allows to close the window and remove the protective grid for cleaning of accumulated dust on it.
P. IVANOV, Stupino, Moscow region.
Recommend to read
THE SLED WITH RUBBER BAND
That the cord does not interfere with the movement of the sled during the descent from the mountain, I propose to make it retractable. For this to end you need to tie the two segments of...
“SANDWICH” IN PLACE OF THE BALSA
In the last ten years, model Aeronautics-members syut G. Votki claim with the same success at the national competitions held by the Ministry of education, repeatedly winning prizes....
