أرسل هذا في رسالة قصيرة: Influence of carbon nanotubes on the performance of bismuth sodium titanate-bismuth potassium titanate-barium titanate ceramic/cement composites

  ______     ___                 ___      _  __  
 /_   _//   / _ \\      ___     / _ \\   | |/ // 
   | ||    | / \ ||    /   ||  | / \ ||  | ' //  
  _| ||    | \_/ ||   | [] ||  | \_/ ||  | . \\  
 /__//      \___//     \__ ||   \___//   |_|\_\\ 
 `--`       `---`       -|_||   `---`    `-` --` 
                         `-`