發送短信 : Ferroelectric glass-ceramics from the PbO-GeO2-Nb2O5 system

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