發送短信 : Digital Twins and Cyber–Physical Systems toward Smart Manufacturing and Industry 4.0: Correlation and Comparison

 _    _    _    _    __   __   __   __   __   __  
| || | || | || | ||  \ \\/ //  \ \\/ //  \ \\/ // 
| || | || | || | ||   \   //    \ ` //    \   //  
| \\_/ || | \\_/ ||   / . \\     | ||     / . \\  
 \____//   \____//   /_//\_\\    |_||    /_//\_\\ 
  `---`     `---`    `-`  --`    `-`'    `-`  --`