参考文献:
Denhart, Derek John Ditta, Jonathan L. King, Dalton Macor, John E. Marcin, Lawrence R. Mattson, Ronald J. Meng, Zhaoxing Patent: US2/63768 A1, 2 Location in patent: Page/Page column 9
参考文献:
Frackenpohl, Jens Müller, Thomas Heinemann, Ines Von Koskull-döring, Pascal Rosinger, Christopher Hugh Häuser-Hahn, Isolde Hills, Martin Jeffrey Patent: US21/87 A1, 21 Location in patent: Paragraph 221