發送短信 : Synthesis of Si02 nanopowder from rice husk ash

 _    _     ______   ______    _    _     ______  
| || | ||  /_   _// |      \\ | || | ||  /_   _// 
| || | ||   -| ||-  |  --  // | || | ||  `-| |,-  
| \\_/ ||   _| ||_  |  --  \\ | \\_/ ||    | ||   
 \____//   /_____// |______//  \____//     |_||   
  `---`    `-----`  `------`    `---`      `-`'