發送短信 : Origin of shrinkage, distortion and fracture of photopolymerized material

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