Petroleum and related products - Determination of the extreme-pressure and anti-wear properties of fluids - Four ball method (European conditions) (ISO 20623:2003); German version EN ISO 20623:2003— 26 стр.
Concrete, reinforced and prestressed concrete structures - Part 2: Concrete - Specification, properties, production and conformity - Application rules for DIN EN 206-1— 62 стр.
Concrete, reinforced and prestressed concrete structures - Part 2: Concrete - Specification, properties, production and conformity; Application rules for DIN EN 206-1; Amendment A2— 28 стр.