أرسل هذا في رسالة قصيرة: Novel steel-concrete-steel sandwich composite plates subject to impact and blast load

  ____       ___     _    _    _    _    _    _   
 |  _ \\    / _ \\  | \  / || | || | || | |  | || 
 | |_| ||  / //\ \\ |  \/  || | || | || | |/\| || 
 | .  //  |  ___  ||| .  . || | \\_/ || |  /\  || 
 |_|\_\\  |_||  |_|||_|\/|_||  \____//  |_// \_|| 
 `-` --`  `-`   `-` `-`  `-`    `---`   `-`   `-`