In radio and electrical appliances are often the wire is passed in a hole made in the sheet metal. Sharp edges can break the insulation and cause a short circuit. Therefore, usually in the hole is installed a protective plastic or rubber grommet. Replace it with a home practice can tube of medical bottle: it is easy to make a hole with a hot metal rod and the edges to them — zavaliat.
Recommend to read
WHY STING “JADWIGA”?
Bee venom — a valuable and irreplaceable raw material for many drugs — get different. For example, when using the device "Jadwiga". It takes on a special frame-dosborne placed in the...
YOU TAKEOFF!
Training RC model airplane. This publication is for those who have sufficiently mastered the piloting cord model airplanes and thinking about the next step — creating the RC. You can, of...
