أرسل هذا في رسالة قصيرة: Comparative analysis of sustainable manufacturing process in the use of polycarbonate compared to the use of aluminum in mobile phone back covers

            _____     ____     _    _    _    _   
    ___    |  ___||  |  _ \\  | || | || | |  | || 
   /   ||  | ||__    | |_| || | || | || | |/\| || 
  | [] ||  | ||__    | .  //  | \\_/ || |  /\  || 
   \__ ||  |_____||  |_|\_\\   \____//  |_// \_|| 
    -|_||  `-----`   `-` --`    `---`   `-`   `-` 
     `-`