名词
中文翻译：中央循环管
同义词：
['central pipe', 'central conduit例句：1. The central circulating tube is responsible for the circulation of the fluid.（中央循环管负责流体的循环。）']
例句：
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1. The central circulating tube is responsible for the circulation of the fluid.
中央循环管负责流体的循环。
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2.The central circulating tube was designed to improve the efficiency of the system.
中央循环管的设计旨在提高系统的效率。
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3.The central circulating tube was used to cool down the engine.
中央循环管被用来冷却发动机。