أرسل هذا في رسالة قصيرة: RECYCLED CONCRETE AGGREGATE : AS A SUSTAINABLE BUILDING MATERIAL

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