Widespread, cassette radio. Storage cassettes make a simple stand as shown in the figure.
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ASSISTANTS MOTORIST
DEVICE FOR CHARGING BATTERIES is a rectifier device with electronic current regulator (Fig. 1). A rectifier manufactured by bridge circuit of diodes V1 — V4 (Fig. 2), and the electronic...
ON THE EVE OF PEARL HARBOR
By the end of the First world war the Navy of the United States of America was large, but very strange composition: a significant linear force, the almost complete lack of any modern...