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|      \\  |  ___||   ____      / _ \\  | || | || 
|  --  //  | ||__    |    \\   | / \ || | '--' || 
|  --  \\  | ||__    | [] ||   | \_/ || | .--. || 
|______//  |_____||  |  __//    \___//  |_|| |_|| 
`------`   `-----`   |_|`-`     `---`   `-`  `-`  
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Text this: An L-shaped and bending-torsion coupled beam for self-adaptive vibration energy harvesting