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

单词	key telephone system
释义	key telephone system [`kē `tel·ǝ´fōn ´sis·tǝm] ^{COMMUNICATIONS} A telephone system consisting of phones with several keys, connecting cables, and relay switching apparatus, which does not need a special operator to handle incoming or outgoing calls and which generally permits users to select one of several possible lines and to hold calls.
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