参考文献:
Alam, Muzaffar Berthel, Steven Joseph Brinkman, John A. Hawley, Ronald Charles Li, Hongju Palmer, Wylie Solang Pietranico-Cole, Sherrie Sarabu, Ramakanth Smith, Mark So, Sung-Sau Yi, Lin Zhai, Yansheng Zhang, Qiang Zhao, Shu-Hai Patent: US1/951 A1, 1 Location in patent: Page/Page column 79