Widespread, cassette radio. Storage cassettes make a simple stand as shown in the figure.
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"Not long ago, the chief engineer of one of the factories producing refrigerators, V. V. Ulyanovsky, called me. As it turned out, he was interested in the thermostat I built for storing...
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Digital multimeter in a new role. Inexpensive digital multimeters M-830В today widely used not only in industry but also in everyday life: for example, to measure the voltage in the...
