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
IN FLIGHT, THE ROCKET PLANE
Rocket class S4, on the construction which I want to tell the readers of the journal "modelist-Konstruktor", was designed and built in 1989, but until today Dnipropetrovsk athletes on...
WEAPONS AIR FIGHTERS
The followers of Cordoba modeling we offer today a selection of two closely-related within the meaning of materials. In the first of them tells of a very successful training model, which...
