买开发板时带的几个程序，有定时器时间管理器等，方便学习。
Buy a development board with several procedures, time management, timer, etc., to facilitate learning.
系 统设备包括生物负电离子发生器、负电离子导入器、经络穴位梳理器、理疗时间管理器；
The system device comprises a biological negative electric ion generator, a negative electric ion introducer, a channel-point carder and a physical therapy time manager;
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