A superimposed circuit derived from two suitably arranged pairs of wires called side circuits, with each pair of wires being a circuit itself and at the same time acting as one conductor of the phantom circuit.

• 一种由称作半边电路的两对线路经适当安排形成的叠加电路。每一对线本身既作为电路，同时又充当幻象电路的一个导体。