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文章介绍一种构思新颖、设计独特、性能可靠、操作方便的闭路电视教学双向遥控系统，并论述该系统的设计思想、特点以及实现各功能的关键技术。
The article introduces a novel, unique design, reliable performance, easy to operate two-way closed-circuit television teaching remote control system, and discusses the design of the system, features and the key technologies to achieve each function.