Demirel, ọkọ oju-irin ọkọ irin ajo agbegbe ti ṣẹda ayọ nla ati mu iṣẹ pọ si fun iṣelọpọ ibi-nla, o sọ. 
Demirel, oko oju-irin oko irin ajo agbegbe ti seda ayo nla ati mu ise po si fun iselopo ibi-nla, o so. 