名词短语
中文翻译：主线办公室
同义词：
['main trunk office', 'main office']
例句：
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1.The trunk line office handles all incoming and outgoing calls.
主线办公室负责接听所有来电和拨打电话。
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2. The main trunk office is located at the top of the building.
主线办公室位于大楼顶部。
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3. The main trunk office provides customer service for all departments.
主线办公室为所有部门提供客户服务。