It generates time standard signal using crystal oscillator, here is the quartz crystal oscillator.
用晶体振荡器产生时间标准信号，这里采用石英晶体振荡器。
The output of the oscillator can be used as a standard signal for calibration of the differentiator to employ in research on the transformation of physiological pulse wave forms in medical science.
电路输出可以作为标准信号，用来校准医用微分器，作生理电脉冲波形变换的研究。
Voltage controlled crystal oscillator (VCXO) plays an important roll in the atomic frequency standard.
压控晶体振荡器是原子频标的重要组成部分。
Voltage controlled crystal oscillator (VCXO) plays an important roll in the atomic frequency standard.
压控晶体振荡器是原子频标的重要组成部分。
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