發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : An evaluation of heat loss on top of solar collector with multilayered absorber in solar water heating system