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- 基于8051的频率计,使用stc的倍频功能可测至960kHz以上,同时可输出精确地自检信号,切换显示频率周期及显示锁定-Based on the 8051 frequency meter, using stc multiplier function can be measured to 960kHz or more, while self-test signal can be output accurately, the switching frequency cycles and displa