發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Development of scratch resistance SiO2 nanocomposite coating for teak wood