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单词 phantom circuit
释义

phantom circuit

noun
An arrangement of telegraph or other electric wires equivalent to an extra circuit.If a telephone company was not happy with a gain of one circuit from two pairs, they could always take two phantom circuits, additional repeat coils and "phantom the phantoms" to obtain seven circuits over four pairs of wire....
  • Engineers commonly called duplexed telephone circuits ‘phantom circuits’ or simply ‘phantoms.’
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更新时间:2025/3/22 13:55:34