本英国标准规定了独立开路压缩空气的要求 带有面罩的呼吸器，仅在紧急情况下逃生时使用 来自受化学品污染地区的响应人员（火灾、救护车、警察）和成年平民， 生物、放射性和核（CBRN）试剂。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This British Standard specifies requirements for self-contained open-circuit compressed air breathing apparatus incorporating a hood, intended to be used only during escape by emergency responders (fire, ambulance, police) and adult civilians from areas contaminated by chemical, biological, radiological and nuclear (CBRN) agents.All current amendments available at time of purchase are included with the purchase of this document.