@echo off&setlocal enabledelayedexpansion
for /f "tokens=1*" %%i in ('type 1.txt^|findstr /i /r "deivce$"') do set "SN=!SN! %%i"
set SN=!SN:~1!
echo !SN!
pause
或者是
@echo off&setlocal enabledelayedexpansion
for /f "tokens=1*" %%i in ('type 1.txt^|findstr /i /r "deivce$"') do set SN=!SN! %%i
set SN=SN=!SN:~1!
echo !SN!
pause