NF A87-013-1*NF EN ISO 9692-1:2013 Welding and allied processes - Types of joint preparation - Part 1 : manual metal-arc welding, gas-shielded metal-arc welding, gas welding, TIG welding and beam welding of steels
2013NF A87-013-1*NF EN ISO 9692-1:2013 Welding and allied processes - Types of joint preparation - Part 1 : manual metal-arc welding, gas-shielded metal-arc welding, gas welding, TIG welding and beam welding of steels