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