Bohr frequency principle 波玻尔频率定则
double frequency principle 双频法
the wide frequency principle 扩频原理
frequency of use principle 使用频次原则
Frequency conversion work principle 变频工作原理
frequency shifting principle 频谱搬移原理
A kind of induction motor soft start control method based on discrete frequency principle is introduced.
介绍了一种基于离散频率原理的电机软启动控制方法。
This paper is an analysis of self-stabilization frequency principle of the single frequency He-Ne laser.
本文首次对这种激光器的自稳频原理进行了分析。
Based on equal precision frequency principle, this design avoids traditional cymometer's defect that precision declines as the frequency measured declines.
根据等精度测频原理，本设计克服了基于传统测频原理的频率计的测量精度随被测信号频率的下降而降低的缺点。
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