It is convenient to create a temporary memo — whether it is preparing the card for your file, or just notes about the latest Affairs in the coming days, or envelopes with letters awaiting answer: they are placed between the turns of the springs (preferably of large diameter). Ensure that the spring does not ride, attach the ends of tin or cardboard cheeks.
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COMPASS — DRILL ASSISTANT
If you need to drill through wall, out the other side exactly in the right place — use...a compass. Of course, in collaboration with the magnet, which should be put behind the wall...
THE GYRO — GLIDER
In the latest issue of our magazine published a series of articles of the group of designers of the gyros about the features of the construction of these helicopters, how to build...
