PROTECCION INDIVIDUAL DE LOS OJOS. FILTROS PARA EL INFRARROJO. ESPECIFICACIONES DEL COEFICIENTE DE TRANSMISION (TRANSMITANCIA) Y USO RECOMENDADO
PERSONAL EYE-PROTECTION. INFRARED FILTERS. TRANSMITANCE REQUIREMENTS AND RECOMMENDED USE
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CTN 81 - Occupational health and safety
It is cancelled by: UNE-EN 171:1993
