Finally, the paper makes comparison and choice of the evaluating standard of the power frequency electric field, and brings forward more objective standard.
最后，本文对工频电场的评估标准进行了比较与选择，并提出了较为客观的依据标准。
Phase comparison is a high precision comparing method for frequency standard.
比相法是一种高精度的频标比对方法。
The comparison table of modern practical atom clock's performance index is given. The index of transferring and comparing standard time-frequency signal by modern radio means is also listed.
给出了现代实用型原子钟的性能指标比较表，和用现代无线电手段传递、比对时频标准信号达到的指标。
The comparison table of modern practical atom clock's performance index is given. The index of transferring and comparing standard time-frequency signal by modern radio means is also listed.
给出了现代实用型原子钟的性能指标比较表，和用现代无线电手段传递、比对时频标准信号达到的指标。
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