“manual switchboard”的概念、定义、翻译、参考文献-科学参考

单词	manual switchboard
释义	manual switchboard [`man·yǝ·wǝl `swich´bȯrd] ^ELECTRICITY Telephone switchboard in which the connections are made manually, by plugs and jacks, or by keys.
随便看	Meliaceae melilite melilitite Melinae Melinninae melioidosis Meliolaceae meliphane meliphanite melissic acid melissophobia melitose melitriose Melittidae melituria Mellin transform mellitate mellite mellitic acid mel-, melo- melodeon Meloidae Meloidea melon melonite

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