名词
中文翻译：双管直接回系统
同义词：
['pipe-to-pipe', 'two-pipe', 'dual-pipe例句：1. The two-pipe direct return system is a popular choice for residential heating systems.（双管直接回系统是住宅供暖系统的一个受欢迎选择。）']
例句：
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1. The two-pipe direct return system is a popular choice for residential heating systems.
双管直接回系统是住宅供暖系统的一个受欢迎选择。
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2. In the two-pipe direct return system, hot water is distributed from the boiler to the faucets.
在双管直接回系统中，热水从锅炉分配到水龙头。
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3.The two-pipe direct return system has several advantages over traditional heating methods.
双管直接回系统比传统的加热方法有多个优点。