1.
A Comparison of High Power UPS Working-frequency Machine and High-frequency Machine
大功率UPS工频机和高频机性能对比
2.
mains frequency coreless induction melting furnace
工频无心感应熔炼炉
3.
cascade power-frequency testing transformer
串级工频试验变压器
4.
VF-FF synchronous switchover controller for revolving air preheater
回转式空气预热器变频-工频同步切换控制器
5.
Research on a Frequency Conversion Measuring Apparatus for Power Frequency Parameters of Transmission Line;
高压输电线路工频参数移频测量装置的研制
6.
The Phase-Locked Synchronization Control System of AC Motor Variable Frequency/Work Frequency Switching;
交流电机变频/工频运行切换锁相同步控制系统
7.
The Study on the Control Device for Measuring the Transmission Line Parameters by Variable-frequency Electrical Measurement;
输电线路工频参数变频测量控制系统的研制
8.
Effects of distribution system on the outbound spectrum of TWACS
配电系统对双向工频通信上行信号频谱的影响
9.
Flowrate Control for Frequency and Inverter Pumps in Parallel Operation
工频与变频输油泵并联运行的流量调节
10.
Study on Fast Main Frequency-Correction Parameters Based on Phase Difference Method
基于相位差法的快速工频频率校正的研究
11.
The Analyse and the Evaluation of the Power Frequency Electric Field and Magnetic Field Around the City;
城区输变电设施工频电场与工频磁场的分析与评估
12.
Determination of electric strength at power frequence for capacitor paper
GB/T12656-1990电容器纸工频击穿电压测定法
13.
speech plus duplex FMFV telegraph equipment
语音加双工调频音频电报设备
14.
ultrahigh frequency radio engineering
特高频无线电工程学
15.
mains medium frequency induction heating equipment
工中频感应加热设备
16.
broadband artificial network (BAN)
宽频人工（电源）网络
17.
maximum oscillating frequency of table
工作台最高振荡频率
18.
Design and Application of a High Frequency Synthesizer in the Frequency-hop System;
跳频通信系统中高频频率合成器的设计与工程应用研究