NF S76-042:1993 RESPIRATORY PROTECTIVE DEVICES FOR ESCAPE. SELF. CONTAINED OPEN-CIRCUIT COMPRESSED AIR BREATHING APPARATUS WITH FULL FACE MASK OR MOUTHPIECE ASSEMBLY. REQUIREMENTS, TESTING, MARKING. (EUROPEAN STANDARD EN 402).
1993NF S76-042:1993 RESPIRATORY PROTECTIVE DEVICES FOR ESCAPE. SELF. CONTAINED OPEN-CIRCUIT COMPRESSED AIR BREATHING APPARATUS WITH FULL FACE MASK OR MOUTHPIECE ASSEMBLY. REQUIREMENTS, TESTING, MARKING. (EUROPEAN STANDARD EN 402).