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German Summary1. Pulver-Metallurgie; 2. Das Flugzeug "Die Ente"; 3. Freischwebende Körper; 4. Die Technik der Wagemutigen (Bergsteiger im Kaukasus mit neuen Anseilvorrichtungen)
English Summary1. powder metallurgy; 2. the plane "the duck"; 3. free-floating bodies; 4. the technique of the daring (mountaineers in the Caucasus with new roping devices)
