أرسل هذا في رسالة قصيرة: Mathematical description of pressure drop profile for the 1-valve and 2-valve bed collapse experiment

 _____     __   __    ______    _____     _____   
|  __ \\   \ \\/ //  /_   _//  |  ___||  |__  //  
| |  \ ||   \ ` //   `-| |,-   | ||__      / //   
| |__/ ||    | ||      | ||    | ||__     / //__  
|_____//     |_||      |_||    |_____||  /_____|| 
 -----`      `-`'      `-`'    `-----`   `-----`