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NF T66-033 (11/1991) (R2011) Tests on mastic asphalt. Determination of workability value. Bernard-brunel test. - Essai sur asphaltes coulés
NF F48-220 (11/1991) (R2011) Railway fixed equipment. Modular power supply for systems of signals equipement, telecommunication equipment and computer equipment. Secondary system. - Installations fixes ferroviaires
NF F48-230 (11/1991) (R2011) Railway fixed equipment. Modular power supply for systems of signals equipment, telecommunication equipment and computer equipment. Tertiary system. - Installations fixes ferroviaires
NF E48-653 (11/1991) (R2006) Hydraulic fluid power. Sampling bottles. Qualifying methods and lot inspection. - Transmissions hydrauliques
NF F17-011 (11/1991) (R2011) Railway rolling stock. Measurement methods of airtightness of railway vehicle and its elements. Tests and interpretation of results. - Matériel roulant ferroviaire
NF C97-298 (11/1991) Audiovisual, video and television equipment and systems. Audio cassette systems.
NF P94-116 (10/1991) (R2011) Soils : investigation and testing. Standard penetration test.
NF E44-501 (10/1991) (R2011) Low power hydraulic turbines. Tests on test rig.
NF T60-187 (10/1991) (R2011) Aqueous machining fluids. Emulsifying and solubilizing suitability and stability at rest.
NF F00-364 (10/1991) (R2011) Railway material in general. Products for electrical connections. 2,8 X 0,5. 5 X 0,8. 6,3 X 0,8 mm. - Matériel ferroviaire en général
NF R18-702-1 (10/1991) (R2011) Road vehicles. Self sustained heating systems installed on commercial vehicules over 3,5 tonnes gvw(R). Part 1 : general safety requirements. - Véhicules routiers
NF R18-702-3 (10/1991) (R2011) Road vehicles. Self sustained heating systems installed on commercial vehicles over 3,5 tonnes gvw(R). Part 3 : specific safety requirements of liquid fuel operated heating systems. - Véhicules routiers