参考文献:
Comess, Kenneth M. Erickson, Scott A. Henkin, Jack Kalvin, Douglas M. Kawai, Megumi Kim, Ki H. BaMaung, Nwe Y. Park, Chang Hoon Sheppard, George S. Vasudevan, Anil Wang, Jieyi Barnes, David M. Fidanze, Steve D. Kolaczkowski, Lawrence Mantei, Robert A. Park, David C. Sanders, William J. Tedrow, Jason S. Wang, Gary T. Patent: US4/678 A, 4 Location in patent: Page 39