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