由以89C51单片机为核心控制器的读写控制装置，实施指令操作，采取射频自动识别车号、车型，远距离电子标签卡收费。
The reader controlled by the single chip of 89C51 is able to identify automatically the number and style of the vehicles and charge with the long-distance electric tags by programmed operating orders.
将条形码读入器的端部在商品标签、信用卡和雇员证的磁性编码条纹上扫掠。
Pass the tip of a wand reader over a magnetically encoded stripe of a merchandise ticket, credit card, or employee badge.
展卡层次结构，找到按钮标签。
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