發送短信 : Wear characteristics of metal matrix composites

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