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文章介绍了一种由中小规模集成块构成的实用工业电视字符叠加系统，它具有结构合理，调试方便，运行可靠，性能价格比高等特点。
The article introduces a practical industrial television character overlay system composed of small and medium scale integrated blocks, which has the advantages of reasonable structure, convenient debugging, reliable operation and high performance-price ratio.