The porch is set from quadruple tree-shaped supports that rise from each insulator to receive loads from the building. It reduces the number of insulators, and saves use.
The porch is set fromquadruple tree-shaped supports that rise from each insulator to receive loads from the building.
门廊是由四叉树形支撑物构成，从每个绝缘基座上呈上升状，承受着建筑物的荷载。
3
The feeders may be set in different modes, and are preferably connected to both the metal casing and one tubular conductor through insulator in the metal casing.