DVS 1707-2006 根据 DIN V 4113-3:2003-11 颁发在主要静态载荷下焊接铝结构的制造商资格证书的先决条件和程序
Prerequisites and procedures for the issuance of a manufacturer's qualification certificate for welding aluminum structures under main static loads according to DIN V 4113-3:2003-11