An input device that defines a location by sensing its position on a data tablet. A lens can be incorporated into the puck if points are being input to give the locations of positions on a detailed drawing.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。