“audio-frequency meter”的概念、定义、翻译、参考文献-科学参考

单词	audio-frequency meter
释义	audio-frequency meter [`ȯd·ē·ō ¦frē·kwǝn·sē ´mēd·ǝr] ^ENGINEERING One of a number of types of frequency meters usable in the audio range; for example, a resonant-reed frequency meter.
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