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This image is a derivative work of the following images:

• File:Conic_ref_syst.png licensed with Cc-by-sa-3.0-migrated, GFDL
  • 2006-03-19T19:05:02Z Maksim 368x329 (5606 Bytes) La bildo estas kopiita de wikipedia:en. La originala priskribo estas: An image of different reference systems for a conic section (ellipse). This is useful for a reduced equation of a conic section. It was created by me, H

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