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my %x= ('miller'=> {'lastname' => 'michael','tel'=>'222'},
        'duran' => {'lastname'=> 'peggy', 'tel' => '333'},
...
}

</h3>

--Original hash
nom: miller lastname: michael tel: 222
...
--Deep copy of Original hash
nom: duran tel: 888 lastname: peggy
nom: miller lastname: michael tel: 222