發送短信 : Sizing of flaws using ultrasonic bulk wave testing : a review

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