earth return circuit

earth circuit

earth return

double return air

Double Return Coal

Return Circuit

220 kV double circuit on the same tower

500 kV double circuit transmission line

750 kV double circuit line on the same tower

Double Circuit Tangent Tower

H-pole double circuit feeder H

UHV double circuit transmission line

phantom circuit

boundary line of two times between earth excavation area and earth fill area

Earth Day [first Earth Day in 1970]

double blind double dummy

Double blind double dummy randomized controlled clinical trial

Double Chambers and Double Layers

Double chambers double layers floating bed

Double columns and double FIDs