發送短信 : Machinability of metal matrix composites

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