DIN EN 2157-1:1993-10 Aerospace series; steel; forging stock and forgings; technical specifications; part 1: general requirements; German version EN 2157-1:1993
1993DIN EN 2157-1:1993-10 Aerospace series; steel; forging stock and forgings; technical specifications; part 1: general requirements; German version EN 2157-1:1993
1993DIN EN 2157-1:1993 Aerospace series; steel; forging stock and forgings; technical specifications; part 1: general requirements; German version EN 2157-1:1993