: This indicates that this is the 9th volume of a multi-part RAR archive. You would need all other parts (part01, part02, etc.) in the same folder to successfully extract the contents.
: This often refers to "Click-to-Run," a common tag for Microsoft Office installers, or it could be a specific scene group's internal project code. GF171122-C2R-FLT.part09.rar
: This is often a date or release ID (likely November 22, 2017). : This indicates that this is the 9th