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Signature: PLRPAT103868
Published: [S.l.]: [s.n.], 1979
Extent: 4 sl., 3 obr.
Keywords: patenty
Publication type: patenty
Notes: 1 sv., G 01 C 15/00, E 21 D 7/02., 18.10.1976, 15.8.1977
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