名词
中文翻译：指导管
同义词：
['control tube', 'guiding tube']
例句：
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1.The engineer used a directing tube to guide the welding process.
工程师使用指导管来引导焊接过程。
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2. The new model car has a directing tube that can adjust the air conditioning.
新款汽车有一个可以调节空调的直通管。
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3.During the construction of the tunnel, a directing tube was installed to ensure safe operation.
在隧道施工期间，安装了一个直通管以确保安全运行。