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Siegfried Hoffmeier
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Dusseldorf, DE
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Patent Grant
Extrusion press for extruding tubes
Patent number
4,206,626
Issue date
Jun 10, 1980
Schloemann-Siemag Aktiengesellschaft
Horst H. Groos
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...