Describir: Two Designs of Power Assisted Ehwwlchair /

  ______   _    _     _  __    _____     ______     ___      ______    _____   
 /_   _// | || | ||  | |/ //  |  ___||  /_   _//   / _ \\   /_   _//  |  ___|| 
 `-| |,-  | || | ||  | ' //   | ||__      | ||    | / \ ||  `-| |,-   | ||__   
   | ||   | \\_/ ||  | . \\   | ||__     _| ||    | \_/ ||    | ||    | ||__   
   |_||    \____//   |_|\_\\  |_____||  /__//      \___//     |_||    |_____|| 
   `-`'     `---`    `-` --`  `-----`   `--`       `---`      `-`'    `-----`