• NF EN 934-2/A1-2012 Admixtures for concrete, mortar and grout - Part 2 concrete admixtures - Definitions, requirements, conformity, marking and labelling.pdf
• NF EN 13036-4-2012 Road and airfield surface characteristICS - Test methods - Part 4 method for measurement of slip skid resistance of a surface the pendulum test - Caract¨¦ristiques de surface des routes et a¨¦roports.pdf
• BS EN IEC 60974-1 2018/A1 2019 Arc welding equipment. Welding power sources.pdf