Ductile iron fittings for gas and water pipelines - MI-fittings - Socketed spigots with plane end branch; application, dimensions and masses (weights)— 3 стр.
Ductile iron pipes, fittings, accessories and their joints for gas pipelines - Requirements and test methods; German version EN 969:1995/A1:1998— 3 стр.
Contract Procedure for Building Works; Part C: General Technical Specifications for Building Works; Systems for Central Heating and Central Raw Water Heating— 21 стр.