While still in school, I restored the spent battery pocket receiver rather primitive, but effective way. With pliers gently removed the graphite rod and filled the battery with water. Then waited until the water completely evaporated, put back stem — and battery-some time worked better than new.
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TWO PISTONS IN ONE CYLINDER
Our magazine has repeatedly written about the works of children's technical club at HCS Institute of inorganic materials, which for many years was headed by engineer A. S. Abramov. Here...
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In any, even equipped with mini-"Kirovtsy", "Kubots" and other high-class equipment, individual farm, one probably cannot do without manual agricultural tools. Having passed through the...
