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Signature: SSSRPAT679796
Published: [S.l.]: [s.n.], 1979
Extent: 4 sl., 1 obr.
Keywords: patenty
Publication type: patenty
Notes: 1 list, G 01 C 17/02, E 21 B 47/022., 5.1.1978, 15.8.1979
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Library VÚGTK > Patents
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