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单词
j-carrier system
释义
J-carrier system
J-carrier system
[
′jā ¦kar·ē·ər ‚sis·təm
]
(communications)
Broad-band carrier system, providing 12 telephone channels, which uses frequencies up to about 140 kilohertz by means of effective four-wire transmission on a single open-wire pair.
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更新时间:2025/11/30 19:25:36