Translate the following sentence into Turkish.
This method of surveillance... enabled the 400 F.B.I. agents now assigned to the case... to become familiar with the faces of every worker permitted to leave the plant.
Bu gözetleme yöntemi olayla ilgilenen 400 FBI ajanìnìn laboratuvardan çìkma izni olan bütün çalìşanlarìn yüzlerini tanìmalarìnì sagladì.