發送短信 : Measuring bend losses of optical fibres

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