GOST EN 12942-2012 职业安全标准体系.呼吸防护设备.动力辅助过滤装置结合全面罩,半截面罩或四分之一面罩.通用技术要求.试验方法.标记
Occupational safety standards system. Respiratory protective devices. Power assisted filtering devices incorporating full face masks, half masks or quarter masks. General technical reguirements. Test methods. Marking