高通选频滤波器
HPSF High – Pass Selection Filter
无源RC带通选频电路
RC Passive Bandpass Network
变压器零差保护
restricted earth protection
大散差零件
heavily deviated workpiece
非归零差动相位偏移键制
Nonreturn to Zero-Differential Phase Shift Keying
关于零差保护
restricted earth fault protection
光零差光谱学
optical homodyne spectroscopy
光学零差接收机
optical homodyne receiver
过零通断控制
controlling of zero-crossing breaking or shutting off