参考文献:
Breitenstein, Werner Erhardt, Claus Maibaum, Juergen Klaus Ostermann, Nils Zimmermann, Juerg Masuya, Keiichi Konishi, Kazuhide Yokokawa, Fumiaki Kanazawa, Takanori Jacoby, Edgar Marzinzik, Andreas Grosche, Philipp Kawakami, Shimpei Patent: US009/3390 A, 009 Location in patent: Page/Page column 8