電路結構的用法和樣例：
例句
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用來派生一個幻象電路的電路結構。在四線電路中，與「去程」通道相關聯的兩線就形成了一個「半邊電路」，而與「回程」通道相關聯的兩線構成了另一個「半邊電路」。
A circuit arrangement for deriving a phantom circuit. In four wire circuits, the two wires associated with the "GO" channel form one "side circuit", and those associated with the "return" channel form another.
