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Rechnerlexikon

Die große Enzyklopädie des mechanischen Rechnens

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Patents  Sovjet Union  1986

 
  • Patent:SU1216630 07.03.1986 Pavel V. Shilin : Transparency for selecting mounted place of polar planimeter pole
  • Patent:SU1232928 23.05.1986 Anatolij S. Dubov : Planimeter

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