参考文献:
Hormann, Robert Eugene Chortyk, Orestes Le, Dat Phat Patent: US004/765 A, 004 Location in patent: Page/Page column 9-30 Title/Abstract Full Text Show Details Chortyk, Orestes Le, Dat Phat Hormann, Robert Eugene Patent: US004/765 A, 004 Location in patent: Page/Page column 9-30