名词
中文翻译：拨号交换同义词
同义词：
['dialling exchange', 'dialling exchange']
例句：
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1. The company offers a dialling exchange service for its customers.
该公司为客户提供拨号交换服务。
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2. The dialling exchange is located in the heart of the city.
拨号交换中心位于市中心。
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3. The dialling exchange has been upgraded to provide better customer service.
拨号交换已升级，以提供更好的客户服务。