發送短信 : Buyer-seller relationships in the PCB industry

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