“closed-circuit signaling”的概念、定义、翻译、参考文献-科学参考

单词	closed-circuit signaling
释义	closed-circuit signaling [¦klōzd ¦sǝr·kǝt `sig·nǝ·liŋ] ^{COMMUNICATIONS} Signaling in which current flows in the idle condition, and a signal is initiated by increasing or decreasing the current.
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