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。
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。
High precision quartz oscillators were used for the transmission of BPV standard frequency and time signals at Shanghai Observatory.
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