أرسل هذا في رسالة قصيرة: Acoustic and dielectric properties of 0–3 bismuth sodium titanate-bismuth potassium titanate-barium titanate/cement composites

 ______     _____     _____    _    _    _    _   
|      \\  |  ___||  |__  //  | || | || | |  | || 
|  --  //  | ||__      / //   | || | || | |/\| || 
|  --  \\  | ||__     / //__  | \\_/ || |  /\  || 
|______//  |_____||  /_____||  \____//  |_// \_|| 
`------`   `-----`   `-----`    `---`   `-`   `-`