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set str1=cndos set "str2=abcdefg( "cndos" )" set "str3=%str2:"=\0x22%" sed -i "s/%str1%/%str3%/g" a.txt
@echo off set pattern=cndos sed "s/%pattern%/abcdefg( """"&"""" )/" a.txt
@echo off sed "s/\(cndos\)/abcdefg( \"\1\" )/" a.txt
sed "s/%str%/abcdefg( \x22&\x22 )/g" a.txt