Deleted Recovery mode and OS. How to recover?

I tried to install an 2.10.401 RUU via the SD card method, but the zip was corrupt and didn't work. Now I can't go to the recovery mode, it shows a red triangle, and my phone can only boot to the bootloader and to the download mode.
I tried to install a TWRP recovery, but when I type

Code:

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adb devices

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into the command prompt it doesn't show my phone.
Is there any method to get my phone back?

Any help is appreciated!