pilot direction indicator
speed and direction pilot control valve
zero-sequence direction pilot relay protection
Directional Comparison Pilot Protection
Directional Pilot Protection
negative sequence directional pilot protection
pilot negative sequence directional protection
pilot protection of negative sequence directional component
pilot zero sequence directional protection
under pilot’s direction
licenced pilot [= licensed pilot]
pilot reform; reform experimentation; pilot restructuring enterprise
axis direction and radius direction
direction finding direction of arrival estimation
Direction Of Arrival-Direction Of Departure (DOA-DOD)
1000 kV AC power transmission pilot project
1000kV power transmission pilot project
750 kV power transmission and transformation pilot project