“overhead line”造句，怎麼用overhead line造句

Insulators and fittings for overhead lines. Metal fittings. Sealing arm (BS).

The paper describes the basic switching impulse test results of phase-to-phase insulation in EHV substations and overhead lines.

The overhead line of HVDC power transmission system needs positive and negative leads only, allowing for high power, low loss and long distance power transmission;

Insulators and fittings for overhead lines. Metal fittings. Twining and bracing rods (TG).

Pin insulators of ceramic material for high voltage overhead lines--Dimensions and characteristics

Shackle insulators for high voltage overhead lines

That makes installing subsurface cables 12 to 17 times as pricey as overhead lines, according to National Grid (they also need replacing sooner).

Insulators and fittings for overhead lines. Metal fittings. Galvanized square tubes (TG).