: Indicates this is the fourth part of a split compressed file. To "put together a paper" (or extract the contents), you would generally need all parts (Part 1, Part 2, etc.) in the same folder. Contextual Meaning
The string appears to be a segmented archive file part from a multi-volume RAR archive . Based on the phonetic breakdown of the filename, it likely contains a collection of Tajik (TJ) music or media. Filename Breakdown delamemostblsadabekashgalytrwathinmabrTJ.part4.rar
: Use a tool like WinRAR or 7-Zip to open the first part. : Indicates this is the fourth part of