A simple “opener” for metal cans with lacquer or varnish can be done in just a minute from block of wood and two nails.
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The first experimental coaxial helicopter construction.And.Kamov, who headed at that time, the Bureau of new technology of TSAGI, took to the air in 1947. In 1948 N. And.Kamov continued...
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Machinery and apparatus air cushion (profit centers and WUAs), every year more and more attracted the attention of designers all over the world. This is not surprising. The use of the...
