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1.The surface duct is a crucial component in the cooling system.
表面管道是冷却系统的关键部件。
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2. The engineer designed the surface duct to distribute heat evenly.
工程师设计了表面管道，以均匀分布热量。
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3.The surface duct was responsible for carrying air from the engine to the cabin.
表面管道负责将空气从发动机输送到客舱。