3维工频电场计算
three-dimensional harmonic electric field calculation
50Hz工频干扰
50Hz power frequency interference
50hz Frequency Interference
50 Hz interference
50Hz工频陷波器
50Hz power frequency notch filter
比利时OSB双频(工中频)感应淬火机
Belgium OSB double frequency(work-intermediate frequency) Queching machine
变频工况
Frequency-convertion Mode
变频-工频切换
switching between variable frequency and industrial frequency
变频-工频同步切换
VF-FF synchronous switching
变频转工频
Frequency Conversion to Working Frequency
VF to WF
不明原因工频闪络
unidentified power frequency flashover
低频工业示波器
LF industrial oscilloscope
地面最大工频电场强度
Maximum Power Frequency Electric Field Gradient on Ground
短时工频耐受
Short-time Power Frequency Tolerance
短线圈工频前炉
short coil normal frequency forehearth
非工频暂态分量
non-power frequency transient component