说明：掌上个人数字处理系统，实现通讯录、日历、计算器、电子画板功能。
Handheld personal digital processing system, realize the mail list, calendar, calculator, electronic drawing board function.
本发明公开了一种压感电子输入系统，主要包括：电子画笔，用于接触电子画板本体，并发出位置和压力信息；
The invention discloses a pressure sensitive electronic input system, mainly including: electronic brush, to send out position and pressure information;
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