@echo off
set Regf=\[HKEY_LOCAL_MACHINE\SOFTWARE\dzh\SuperStk\Market\HK\]
for /f "tokens=1* delims=:" %%i in ('type aaa.reg^|findstr /in "%Regf%"') do set /a Regnum=%%i-1
for /f "skip=%Regnum% tokens=1* delims=:" %%a in ('type aaa.reg^|findstr /in .*') do (
echo.%%b >>555.reg
%%b==""&&goto :end)
:end
PAUSE&exit
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if "%%b"=="" goto :end
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@echo off&setlocal enabledelayedexpansion
(for /f "delims=" %%a in ('type 1.reg') do if defined n (
        set "a=%%a"
        if "!a:~0,1!!a:~-1!"=="[]" goto:eof
        echo !a!
        ) else if /i "%%a"=="[HKEY_LOCAL_MACHINE\SOFTWARE\dzh\SuperStk\Market\HK]" set n==&echo %%a
)>1-.reg
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@echo off
(for /f "delims=" %%a in ('type 1.reg') do if defined n (
        set "a=%%a"
        setlocal enabledelayedexpansion
        if "!a:~0,1!!a:~-1!"=="[]" goto:eof
        echo !a!
        endlocal
        ) else if /i "%%a"=="[HKEY_LOCAL_MACHINE\SOFTWARE\dzh\SuperStk\Market\HK]" set n==&echo %%a
)>1-.reg
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@echo off
set Regf=[HKEY_LOCAL_MACHINE\SOFTWARE\dzh\SuperStk\Market\HK]
(for /f "delims=" %%a in ('type aaa.reg') do (
    if defined ~echo (
        if %%~a==%%a goto :end
        echo %%a
    ) else (
        if /i "%%a"=="%Regf%" (
            set ~echo=.
            echo %Regf%
        )
    )
)) >555.reg

:end
PAUSE&exit
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