Ductile iron wide tolerance couplings and flange adaptors for use with pipes of different materials: Ductile iron, grey iron, steel, PVC-U, PE, fibre-cement; German version EN 14525:2004— 31 стр.
Private and individual drinking water supply; governing principles relating to the requirements to be met by drinking water; design, construction and operation of the supply systems; DVGW; code of practice— 16 стр.
Tendering and performance stipulations in contracts for construction works (VOB); part C: general technical specifications in contracts for construction works (ATV); well sinking— 10 стр.