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Restore "Unknown" Partition To ntfs

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I'm using Fedora.

I don't know why my NTFS (/dev/sda3) partition is changed to "Unknown". I can't read this partition. My important files are located in there and I have to change it back to ntfs without losing data. enter image description here Any helps would be great appreciated.

P.S:

I think this problem occurred since I reformatted /boot/efi partition in /dev/sda1

UPDATE

I also tried to READ-ONLY /dev/sda3 :

sudo mount -r -t ntfs-3g /dev/sda3 /mnt/ -o force

But it returns this error :

NTFS signature is missing.
Failed to mount '/dev/sda3': Invalid argument
The device '/dev/sda3' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?

UPDATE 2

I also ran test disk :

sudo testdisk /dev/sda3

And testdisk says :

Partition sector doesn't have the endmark 0xAA55

And after testdisk Analyse :

The following partition can't be recovered:
     Partition               Start        End    Size in sectors
>  HPFS - NTFS          31779 193 31 47669  65 12  255264768

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