gas helmet
近义词：gasmask，respirator，gasmask，
英英释义
Noun
- a protective mask with a filter; protects the face and lungs against poisonous gases
例句
用作名词(n.)
- They contrived a mask against poison gas.他们设计了一种防毒面具。
- Rioters donned handkerchiefs as gas masks.暴乱者扎上手帕捂住口鼻作为防毒面具。