“parametric down-converter”的概念、定义、翻译、参考文献-科学参考

单词	parametric down-converter
释义	parametric down-converter [¦par·ǝ¦me·trik `dau̇n kǝn´vǝrd·ǝr] ^ELECTRONICS Parametric converter in which the output signal is at a lower frequency than the input signal.
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