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