参考文献:
Erickson, Shawn David Gillespie, Paul Guertin, Kevin Richard Karnachi, Prabha Saba Kim, Kyungjin Ma, Chun McComas, Warren William Pietranico-Cole, Sherrie Lynn Qi, Lida Tilley, Jefferson Wright Zhang, Qiang Patent: US009/6 A, 009 Location in patent: Page/Page column 9