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

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Text this: Electrical properties of Er<inf>2</inf>O<inf>3</inf>-Doped potassium sodium niobate based silicate glass