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| 3D-modela | ||
| construction | 
| Used commands: | Arc: Center, Start, Angle Polyline Join Solid->Extrude Planar Curve->Straight Solid->Cylinder Copy Solid->Union Solid->Difference | 
Created by Sonja Gorjanc - 3DGeomTeh - Developing project of the University of Zagreb  
 Translated by Helena Halas and Iva Kodrnja