Ключевые слова:
Pipe fittings, Sewers, Pressure pipes, Plastic pipelines, Potable water, Water supply, Water supply and waste systems (building, Physical properties of materials, Testing conditions, Definitions, Polyethylene, Drainpipes, Plastics, Drainage, Valves, Pipes, Water supply (buildings), Colour, Pressure, Pipework systems, Water, Sewerage, Additives