名词
中文翻译：隧道环
同义词：
['tunnel crown', 'tunnel crown ring']
例句：
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1. The tunnel ring is a crucial partof the construction process.
隧道环是施工过程中至关重要的一部分。
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2. The tunnel ring was designedto improve safety and efficiency.
隧道环的设计旨在提高安全性和效率。
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3. Thetunnel ring was constructed usingadvanced technology.
隧道环采用了先进的技术进行建造。