What is a dgk file and how do I open a dgk file?
DGK is a three-dimensional model created by Delcam CAD programs, including PowerSHAPE, PowerMILL, CopyCAD, PowerInspect, and ArtCAM. It contains the model geometry, which is comprised of wireframes, surfaces, and solids, and is used to save and load 3D designs.
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How to open dgk file on Wikipedia
How to open dgk file on Microsoft.com