phase angle {angle of phase difference}
ac nominal phase-phase potential transformer
amplitude-phase measuring system
angle-phase-digital converter
anglephasedigital converter
arbitrary phase-angle power relay
有功无功功率继电器
任意相角功率继电器
有功-无功功率继电器
任意相角功率电驿
有功-无功功率电驿
arbitray phase angle power relay
automatic digital measuring phase
branch phase-angle difference
compensations phase angle
composite phase measuring profilometry
constant phase angle curve
constant phase-angle locus