名词
中文翻译：服务气密面具
同义词：
['service mask', 'gas mask']
例句：
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1.In the event of an emergency, it's important to have a service gas mask handy.
在紧急情况下，有备用的气密面具是很重要的。
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2. The firefighters used their service gas masks to protect themselves from the smoke.
消防员们使用他们的气密面具来保护自己免受烟雾的影响。
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3.During the drill, everyone was required to wear their service gas masks.
演习期间，每个人都被要求佩戴他们的气密面具。