GOST EN 1827-2012 职业安全标准体系.呼吸保护装置.无吸气阀式带分离式过滤器适用于防护气体和微粒吸入或仅适用于防护微粒的吸入的半罩面具.通用规格
Occupational safety standards system. Respiratory protective devices. Half masks without inhalation valves and with separable filters to protect against gases or gases and particles or particles only. General specifications