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介绍一种建筑物上塔钟的微机控制系统⒚系统由单片机构成的电子时钟具有高精度、自校准功能,塔钟以它为基准走时,并能实现停电后的自动追时⒚“,”A single chip microcomputer system for tower clock controlis introduced in this paper. In the system, electric clock formed by single chip microcomputer possesses auto adjustment and high precision. Tower clock based on electric clock can retrieve time automaticly once power cuts.