Welding personnel - Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic materials; German version EN 1418:1997— 10 стр.
Concrete, reinforced and prestressed concrete structures - Part 4: Additional rules for the production and conformity control of prefabricated elements— 8 стр.
Tendering and performance stipulations in contracts for construction works (VOB); part C: general technical specifications in contracts for construction works (ATV); concrete work— 10 стр.