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You can import the following files:
Drawing Exchange Format files with a .dxf file extension. This file type is an ASCII or binary description of a drawing file.
Design Web Format files with a .dwf file extension. DWF files are used to distribute a drawing for others to view in a Web browser, review, and edit using free Autodesk® software and tools.
Drawing templates with a .dwt file extension. This file type contains predefined settings that you can reuse when you create new drawings.