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| Extension | File Type Developer | File Category | File Type Description | Software | Software Developer |
|---|---|---|---|---|---|
| .CDE | Kubotek Corporation | Data Files | CADKEY Dynamic Extension | CADKEY | Kubotek Corporation |
| .CDL | Kubotek Corporation | CAD Files | CADKEY Wireframe Design File | CADKEY | Kubotek Corporation |
| .CDW | ASCON | CAD Files | KOMPAS Document | CADKEY | Kubotek Corporation |
| .CKD | Kubotek Corporation | CAD Files | Kubotek Design Container | Kubotek USA KeyCreator | Kubotek Corporation |
| .KSA | Kubotek Corporation | Data Files | KeyCreator Settings Archive File | Kubotek USA KeyCreator | Kubotek Corporation |
| .PRT | PTC | CAD Files | Pro/ENGINEER Part File | CADKEY | Kubotek Corporation |
| .PTN | Nuance | Data Files | PaperPort Thumbnail File | CADKEY | Kubotek Corporation |
| .STEP | Unknown Developer | 3D Image Files | STEP 3D Model | Kubotek USA KeyCreator | Kubotek Corporation |
| .STL | 3D Systems | CAD Files | Stereolithography File | Kubotek USA KeyCreator | Kubotek Corporation |
| .U3D | 3D Industry Forum | 3D Image Files | Universal 3D File | Kubotek USA KeyCreator | Kubotek Corporation |
| .X_T | Siemens PLM Software | CAD Files | Parasolid Model Part File | Kubotek USA KeyCreator | Kubotek Corporation |
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