To Import All Standards From a Drawing (AutoCAD Mechanical Toolset)

At the Command prompt, enter AMSETUPDWG.
In the Drawing Setup dialog box, click Overwrite Settings.
At the command prompt enter T and press Enter for the Drawing enter Template option.
At the command prompt enter B and press Enter.
In the Select Template Drawing dialog box, select the file to import the standard from and click Open.
Note: To import from a .dwg file, you must first save it as a .dwt file and then import from the dwt file.

AMSETUPDWG replaces the standards in the current drawing with the standards of the file you are importing from.