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单词
four-frequency diplex telegraphy
释义
four-frequency diplex telegraphy
four-frequency diplex telegraphy
[
¦fȯr ¦frē·kwən·sē ¦dī‚pleks tə′leg·rə·fē
]
(communications)
Frequency-shift telegraphy in which each of the four possible signal combinations corresponding to two telegraph channels is represented by a separate frequency.
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更新时间:2026/5/7 16:17:44