英语词汇metallic circuit怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	metallic circuit
释义	Definition of metallic circuit in English: metallic circuit noun Telegraphy A telegraphic circuit in which the return path of the current is through a metal conductor (e.g. a wire) rather than through the earth. Origin Mid 19th century. Definition of metallic circuit in US English: metallic circuit noun Telegraphy A telegraphic circuit in which the return path of the current is through a metal conductor (e.g. a wire) rather than through the earth. Origin Mid 19th century.
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Definition of metallic circuit in English: