أرسل هذا في رسالة قصيرة: Influence of longan packed bed arrangement on air flow pattern under forced-air convection

  ______    _____     _____      ___      _____   
 /_   _//  |  ___||  /  ___||   / _ \\   |__  //  
   | ||    | ||__   | // __    | / \ ||    / //   
  _| ||    | ||__   | \\_\ ||  | \_/ ||   / //__  
 /__//     |_____||  \____//    \___//   /_____|| 
 `--`      `-----`    `---`     `---`    `-----`