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NF E11-029 (05/1991) (R2002) Steel...
NF A51-080 (04/1991) (R2011) Shape memory alloys (SMA). Vocabulary and measures. - Alliages à mémoire de forme (AMF)
NF F62-001-1 (04/1991) (R2011) Railway rolling stock. Magneto-thermic microcircuit-breakers for maximum current for controls and auxiliaries circuits. Generalities and tests. - Matériel roulant ferroviaire
NF F62-001-2 (04/1991) (R2011) Railway rolling stock. Magneto-thermic microcircuit-breakers for maximum current for controls and auxiliaries circuits. Dimension. - Matériel roulant ferroviaire
NF F62-001-3 (04/1991) (R2011) Railway rolling stock. Magneto-thermic microcircuit-breakers for maximum current for controls and auxiliairies circuits. Collection of particulfar leaves. - Matériel roulant ferroviaire
NF P98-413 (04/1991) Road safety barriers. Steel guard rails (profiles A and B). Installation and assembly requirements. - Barrières de sécurité routières
NF P98-432 (04/1991) Road safety barriers. In-situ concrete partition walls and low walls. Implantation conditions. - Barrières de sécurité routières
NF X43-273 (04/1991) (R2011) Air quality. Workplace air. Determination of methylbromide. Sampling by pumping trough activated charcoal. - Qualité de l'air
NF L22-072 (04/1991) (R2011) Aerospace construction. Bolts and screws. 92 degrees cruciform recess.
NF P98-521 (03/1991) (R2011) Road traffic signs. Decors for traffic signs. Sampling methods. - Signalisation routière verticale
NF P98-522 (03/1991) (R2011) Road traffic signs. Decors for traffic signs. Test method for measuring colorimetric characteristics. - Signalisation routière verticale
NF P98-523 (03/1991) (R2011) Road traffic signs. Retroreflecive coatings. Methods of measuring photometric characterics of retroreflectors. - Signalisation routière verticale
NF P98-524 (03/1991) (R2011) Road traffic signs. Retroreflective coatings. Test method for measuring coefficient of retroreflection. - Signalisation routière verticale