Muscovite Is a Wonderful Stone

Karelia, Chupinskie mining operations. A piece of mica rock. Extraction, use of mica in pre-revolutionary times. Extraction of mica in a modern mine; combines at work; composition with ore. Production processes in the shops of the Petrozavodsk mica factory. Factory laboratory. Testing of mica for strength, electrical conductivity, solubility. Hero of Socialist Labor Antipova at work. Information in the announcer's text about the use of mica in aircraft construction, shipbuilding, radio engineering, space research.

B&W

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