angle of the line to the projection plane
differs to move the protection
change from the vapor phase to the liquid phase
follow close to the line of
walks the line to optimize
anti-galloping phase-to-phase spacer
non-synchronous closing in phase-to-phase
part Ⅲ of phase-to-phase distance protection
phase to phase coupling
phase to phase impedance
phase to phase insulation
phase to phase short circuit