發送短信

數:

提供者:

CAPTCHA:

  _____      ___      _____     _____   __    __  
 /  ___||   / _ \\   |__  //   |  ___|| \ \\ / // 
| // __    | / \ ||    / //    | ||__    \ \/ //  
| \\_\ ||  | \_/ ||   / //__   | ||__     \  //   
 \____//    \___//   /_____||  |_____||    \//    
  `---`     `---`    `-----`   `-----`      `

Please enter what you see:

發送短信 : Preparation of polysulfone and polyethylene membrane and surface modification by plasma and UV radiation for oxygen/nitrogen and carbon dioxide/methane gas separation