- 闭路通信
- closed: adj. 1.关闭着的，封闭着的；密闭着的；保密的。 2 ...
- circuit: n. 1.(某一范围的)周边一圈；巡回，周游；巡回路线[ ...
- signal: n. 1.信号，暗号；信号器。 2.动机，导火线 (fo ...
- closed circuit signalling: 闭路通信
- track-circuit signalling: 轨道电路信号
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closed-circuit signalling中文什么意思
发音:
- 闭路通信
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