“narrow-band frequency modulation”的概念、定义、翻译、参考文献-科学参考

单词	narrow-band frequency modulation
释义	narrow-band frequency modulation [`nar·ō ¦band `frē·kwǝn·sē ´mäj·ǝ`lā·shǝn] ^{COMMUNICATIONS} Frequency-modulation broadcasting system used primarily for two-way voice communication, having a maximum permissible deviation of 15 kilohertz or less.
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