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Stefan B. Vodenicharov
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Sofia, BG
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Patent Grant
Machine for the explosive forming of a workpiece of sheet material
Patent number
4,471,640
Issue date
Sep 18, 1984
Institute po Metaloznanie i Technologia na Metalite
Hristo G. Kortenski
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...