Conversion of BK1 files to DWG. BK1 to DWG CAD converters.
Some version of AutoCAD made a backup copy of opened CAD image in a BK1 format. It is not clear whenever the BK1 file is just renamed copy or somewhat altered, but your best bet is to recover it in the program through normal means, instead making conversion or renaming the file.
Unfortunately, there is no detailed software record in the database for this conversion.
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