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

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Text this: Angle-selective surface based on multi-layered frequency-selective surfaces