: Since .7z is a container format, it holds other files (like documents, code, or images). To see the "full text" of what is inside, you must extract it using a tool like 7-Zip or WinRAR.
If you are looking for the text of a that you believe is named "E152," could you provide more context about where you saw the file name? Are you trying to open this file, or E152.7z
The name typically refers to a compressed archive file created using 7-Zip software. : Since