The proposed system is also characterized by long operation distance, low power, high rate of reading and high flexibility, and it is valuable for engineering utility.
此系统具有作用距离远、功耗低、读取率高、扩展性和灵活性强等优点，具有很强的工程实用价值。
The utility model has simple structure, convenient operation, low cost and considerable generalization value, improves the reuse rate by 10 times and saves the production cost for enterprises.
本实用新型的有益效果是：结构简单，操作方便，成本低廉，反复利用率提高至10倍，给企业节省了生产成本，有很大的推广价值。
The utility model is simple in structure, low in cost, high in reaction rate, and easy in operation.
本实用新型具有结构简单、成本低、反应效率高、易操作的优点。
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