Basically, in these huge refining facilities, crude oil is heated and sent to an atmospheric distillation tower, where it is separated into several fractions.
في هذه الاماكن المعدّة للتكرير ،‏ يُسخن النفط الخام ويُرسل الى برج تقطير ،‏ حيث تتم تجزئته .‏