AFAIK this isn't available in the library but you can find the unit 'traits' in the "equipment.pzeqp" file.
The file is located in the Data subdirectory of the directory where you have installed Panzer Corps (for example C:\Program Files (x86)\Steam\SteamApps\common\Panzer Corps\Data).
You can open this file with Excel (or notepad).
There you can find a column with the unit traits.
For more information about the traits look at
this post