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1·Fly field frequency control is a key to fly field safety.

飞场频率管控对飞行安全极为重要。

2·For welding thicker pieces, automatic frequency control should be adopted.

对于较厚的焊件，应进行频率自动控制。

3·The show energy conservation effect of frequency control system is the best.

说明了变频调速系统的节能效果是最好的。

4·A discrete frequency control method is proposed for thyristorized static switch.

介绍了用于感应电机起动的离散频率控制方法。

5·The industrial frequency control technique lor power load control is introduced .

本文介绍了电力负荷的工频控制技术。

6·There are many optional speed levels and frequency control lifting except the standard speed.

除了标准起升速度外，还有多种速度可供选择，也可选用变频控制起升。

7·Some are equipped with feeding frequency control can be arbitrarily adjust the speed of feeding.

送料部分均配有变频调速，可任意调节送料之速度。

8·A frequency control method for RSC converters was achieved based on the output voltage expression.

基于输出电压表达式，还提出谐振开关电容变换器的频率控制方案。

9·The article introduces a kind of dual threshold frequency control circuit for digital control device.

文章介绍了一种数控装置的双门槛频率控制电路。

10·Including: principle of the high voltage inverter, frequency control scheme of high-voltage inverter.

包括：高压变频器原理，高压变频器变频调速方案。