英语词汇standard frequency and time signals怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	standard frequency and time signals
释义	standard frequency and time signals 简明释义标频时信号网络释义 1 ?标频时信号 standard frequency and time signal 校准频率和时间信号 standard frequency and time signals 标频时信号 standard frequency signal 标准频率信号 .. 2 ?标准频率和时间信号 · =Space Frequency Modulation 空间频率调制 · =Standard Frequency and Time Signals 标准频率和时间信号 · =Sustainer Gas Generator 主发动机气体发生器 .. 双语例句 1 High precision quartz oscillators were used for the transmission of BPV standard frequency and time signals at Shanghai Observatory. 在上海天文台BPV标频和时间信号的发播工作中，使用了高精度石英晶体振荡器。
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