名词
中文翻译：Unknown
同义词：
['闭管，密封管道例句：1. The sealed-tube is used to transport gases and liquids.（密封管用于输送气体和液体。）']
例句：
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1. The sealed-tube is used to transport gases and liquids.
密封管用于输送气体和液体。
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2.The sealed-tube is a crucial component of the pipeline system.
密封管是管道系统的关键组成部分。
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3. The sealed-tube prevents leaks and ensures the safety of the pipeline.
密封管防止泄漏并确保管道的安全。