أرسل هذا في رسالة قصيرة: Toxic-free inorganic coating materials for flame retardation and prevention of flame spreading on underground infrastructure

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