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