$csvfile = "C:\ready.csv"
$CSVData = Import-CSV -delimiter ";" -path $csvfile 
$web = Get-SPWeb -identity "http://test/"
$list = $web.Lists["test list"]
$item = $list.Items
foreach ($row in $CSVData)
 {
   foreach ($i in $item) 
   {
     if ($row.Шифр -ne $i['Шифр'] -and $row.'Код' -ne $i['Код'])
               {
                 write-host 'added'
               }else {
               write-host 'NO'}
               }
               }