NF A 49-112NF A 49-142NF A 49-211NF A 49-250NF A 84-100NF A 84-300NF A 84-330NF A 84-340NF A 84-410NF A 84-430A 84-440NF A 84-620NF A 84-622NF E 29-411NF T 47-220NF X 08-100ISO 4200ISO 7289ISO 9539
适用范围
Material for gas welding and allied processes.Gas distribution network in a workshop
Safety rules for design,realization and exploiting.