mixed tube

例句：

1. 1. The engineer designed a mixed tube to transport heat and gases.
   工程师设计了一个混合管来输送热量和气体。
2. 2.The medical team used a mixed tube to administer medication.
   医疗团队使用了一个混合管来给药。
3. 3. The scientist discovered a new type of mixed tube that could be used for both heating and cooling purposes.
   科学家发现了一种新型的混合管，既可以用于加热也可以用于冷却。