名词
中文翻译：双线电话系统同义词
同义词：
['dual-line telephone system', 'dual-tone multi-frequency (DTMF) telephone system']
例句：
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1. The company offers a duplex telephony service for its customers.
该公司为顾客提供双线电话服务。
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2. The new phone has a duplex telephony feature that allows two people to talk at thesame time.
这款新手机具有双线电话功能，允许两个人同时通话。
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3.The duplex telephony system is designed to provide clear communication between users.
双线电话系统旨在为用户提供清晰的通信。