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

单词	manual telephone system
释义	manual telephone system [`man·yǝ·wǝl `tel·ǝ´fōn ´sis·tǝm] ^{COMMUNICATIONS} A telephone system in which connections between customers are ordinarily established manually by telephone operators in accordance with orders given verbally by calling parties.
随便看	filter-cake washing filter capacitor filter center filter choke filter cloth filter crystal filter design filter discrimination filtered-particle testing filtered radar data filtered stock filter factor filter feeder filter flask filter impedance compensator filtering filter leaf filter loss filter medium filter paper filter pass band filter photometer filter photometry filter press filter-press cell

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