Ключевые слова:
Pipework systems, Pipes, Drainpipes, Plastics, Unplasticized polyvinyl chloride, Polypropylene, Polyethylene, Underground, Water supply and waste systems (building, Drainage, Sewerage, Sewers, Sewage engineering, Pipe couplings, Elastomers, Cements, Welded joints, Dimensions, Marking, Performance, Performance testing, Mechanical behaviour of materials, Physical properties of materials