Cold-rolled uncoated low carbon and high-yield strength steel flats for cold forming; tolerances on size and geometrical tolerances; german version EN 10131:1991— 7 стр.
Construction contract procedures (VOB); part C: general technical specifications in construction contracts (ATV); installation of HVAC systems— 23 стр.
Tendering and performance stipulations in contracts for construction works (VOB); part C: general technical specifications in contracts for construction works (ATV); installation of air conditioning systems— 22 стр.