air-breathing apparatus

基本解释

Respiratory protective devices - Compressed air line breathing apparatus for use with a full face mask, half mask or a mouthpiece assembly - Requirements, testing, marking.
呼吸保护装置。与全罩式面罩、半罩式面罩或口罩一起使用的压缩空气导管呼吸装置。要求、试验和标志。
Every man inside the hull is with air breathing apparatus of 6.8-liter with vehicle, so it effectively prevent harmful and poisonous gas to harm crew.
驾驶室内每个乘员都配有车载6.8升空气呼吸器，可有效防止有害、有毒气体对乘员的危害。
The patent reads: A self-contained open-circuit breathing apparatus for use within a body of water naturally containing dissolved air.
这项专利实质如下：一个孤立的绽放使用的电路呼吸器内的水固然含有溶气机构。