發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Effect of Bi2O3 content on optical and radiation shielding properties of (Na2O, K2O)-SiO2-CaO-Al2O3-B2O3 glass system