NF A89-568*NF EN ISO 14271:2017 Resistance welding - Vickers hardness testing (low-force and microhardness) of resistance spot, projection, and seam welds
2017NF A89-568*NF EN ISO 14271:2017 Resistance welding - Vickers hardness testing (low-force and microhardness) of resistance spot, projection, and seam welds