参考文献:
Blatt, Lawrence M. Andrews, Steven W. Condroski, Kevin R. Doherty, George A. Jiang, Yutong Josey, John A. Kennedy, April L. Madduru, Machender R. Stengel, Peter J. Wenglowsky, Steven M. Woodard, Benjamin T. Woodard, Laura Patent: US25/2678 A, 25 US 252678 A