أرسل هذا في رسالة قصيرة: Experimental study on the thermosiphon solution elevation pump with multiple lunate channels used in minitype solar air-conditionding system

 __   _      ___     __   __   __   __            
| || | ||   / _ \\   \ \\/ //  \ \\/ //     ___   
| '--' ||  / //\ \\   \   //    \ ` //     /   || 
| .--. || |  ___  ||  / . \\     | ||     | [] || 
|_|| |_|| |_||  |_|| /_//\_\\    |_||      \__ || 
`-`  `-`  `-`   `-`  `-`  --`    `-`'       -|_|| 
                                             `-`