發送短信 : Ultrasonic control of marine fouling

 _____      ______    ______    _____   __    __  
|  __ \\   /_   _//  /_   _//  |  ___|| \ \\ / // 
| |  \ ||   -| ||-     | ||    | ||__    \ \/ //  
| |__/ ||   _| ||_    _| ||    | ||__     \  //   
|_____//   /_____//  /__//     |_____||    \//    
 -----`    `-----`   `--`      `-----`      `