It looks like your query is a bit specific! "ajb05920.rar" seems to be a , but it could refer to a few different things depending on the context.
Once you let me know what the of the file is, I can help you with the steps to open it or use what's inside. ajb05920.rar
Instructions for a specific industrial or engineering part? It looks like your query is a bit specific
A guide for a specific game mod, save file, or asset pack? or asset pack?