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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Modern furniture - cabinets, tables, shelving made from chipboard or fibreboard, plywood, wooden boards, etc. however, many traditional corner joints (tenon-eye, vpoldereva on the...
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In the manufacture of printed circuit boards have to drill a lot of holes. This is best done on a drill press. But many radio Amateurs it is? But it is not so difficult to do. My...
