How to get high frequency and high stability current pulse is the emphasis of this section. The paper put forward the concept of current adding switch.
将如何得到高重频、稳定的电流脉冲作为一个研究重点，提出电流叠加开关的概念。
In the ultra high frequency system, the frequency compounder section of the transmitting frequency is operated with DDS/PLL technology.
在甚高频系统中，射频的的频率合成器部分采用DDS/PLL技术。
The high frequency welding H-section steel has properties of broad and thin section component. Its higher axial lateral resistance capacity forms rigid frame.
高频焊接H型钢具有宽肢薄腹构件的特征，其强轴方向具较强的抗侧能力，形成刚性框架。
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