: This is the specific label for the content. While its exact meaning depends on where you found it, "CBRL" is often used in technical or regulatory contexts (such as XBRL reporting formats for financial data).
: This indicates that this is the first volume of a series. To successfully open the contents, you will almost certainly need all subsequent parts (e.g., part02.rar , part03.rar ) in the same folder.
: This identifies the file as a Roshal Archive , a proprietary format known for high compression ratios and error recovery. How to Use This File
