“extremely low frequency”的概念、定义、翻译、参考文献-科学参考

单词	extremely low frequency
释义	extremely low frequency [ek`strēm·lē `lō `frē·kwǝn·sē] ^{COMMUNICATIONS} A frequency below 300 hertz in the radio spectrum. Appreviated ELF.
随便看	amacratic lens Amagat density unit Amagat diagram Amagat law Amagat-Leduc rule Amagat system Amagat volume unit amalgam amalgamate amalgamating table amalgamation amalgamation pan amalgamator amalgam barrel amalgam retort amalgam treatment Amalthea amantadine amanthophilous Amaranthaceae amarantite amarillite Amaryllidaceae A-mast amasthenic lens

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