In the 1930s, pilot and a design engineer A. Cheremukhin designed a new model of helicopter and established a record, which was kept a secret from the world.
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Russia
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Blinken OSA Archivum at Central European University
In the 1930s, pilot and a design engineer A. Cheremukhin designed a new model of helicopter and established a record, which was kept a secret from the world.
Subjects
Subject
Russia
Holdings
Blinken OSA Archivum at Central European University