gawk '/tcp-[a-z]*/{sub(/tcp-[a-z]*/,"proxy"++n)}1' a.txt
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@echo off &setlocal enabledelayedexpansion
(for /f "delims=" %%a in (1.txt) do (
	set "s=%%a"
	if /i "!s!" neq "!s:*tcp-=!" (
		set/p "pv="
		for /f tokens^=4^delims^=^" %%c in ("%%~a") do for %%p in ("!pv!") do echo,!s:%%c=%%~p!
	) else (echo,%%a)
))<2.txt >3.txt
endlocal&pause&exit/b
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for /f tokens^=4^delims^=^" %%c in ("%%~a") do for %%p in ("!pv!") do echo,!s:%%c=%%~p!
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4楼代码已订正，应该可以了

@echo off
set file_tag=1.txt
set file_pro=2.txt

cd /d "%~dp0"
for /f "tokens=1* delims=[]" %%a in ('find /n """tag"":" ^<"%file_tag%"') do (
	set #%%a=1
)
(for /f "tokens=1* delims=[]" %%x in ('find /n /v "" ^<"%file_tag%"') do (
	if defined #%%x (
		for /f tokens^=1-4*delims^=^" %%a in ("%%y") do (
			set /p str=
			call echo %%a"%%b"%%c"%%str%%"%%e
		)
	) else (
		echo=%%y
	)
))<"%file_pro%" >$
move $ "%file_tag%"
pause
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