Aerospace series - Circular tubes, for fluids in titanium and titanium alloys - Wide tolerances; Diameter 4 mm <kleiner => D <kleiner => 40 mm; Dimensions; German and English version EN 4180:2001— 14 стр.
Aerospace series - Metallic materials - General organization of standardization; links between types of EN standards and their use; German version EN 4258:1998— 16 стр.