This file is only a piece of a larger archive. To successfully extract it, you must have all subsequent parts (e.g., zwnd.7z.002 , zwnd.7z.003 , etc.) in the same folder.
Do you have the of this file in the same folder? 7z - Википедия
You can open this using the official 7-Zip (Windows), WinRAR , or mobile apps like 7Zipper (Android).
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