Free DWG Viewer 5.3.0.2 Free DWG Viewer will open native DWG, DXF, and DWF files for viewing, along with accompanying Xref files. It will also open Informative
| Gravitational Lensing 1.00 With this program, one can draw images to see the effect of gravitational lensing. You can easily test the effects of several parameters by
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