The middle portion of the string refers to the domain or the group that hosted or encoded the file.
To find 1080p or 4K versions of older titles. Jur-003-rm-javhd.today01-58-19 Min
To identify the cast (actresses), director, and release date. The middle portion of the string refers to
In the Japanese media industry, every professional release is assigned a unique alphanumeric code known as a "Content ID" or "Set Code." Jur-003-rm-javhd.today01-58-19 Min
To find "external" subtitle files (SRT) that match the timing of this specific video length.
The string appears to be a specific file name or database entry typically associated with adult media indexing sites. Specifically, it follows the naming convention for Japanese Adult Video (JAV) content. 1. The Production Code (JUR-003)