Ключевые слова:
Drainpipes, Drainage, Water supply and waste systems (buildings), Sewers, Pipes, Pipe fittings, Manholes, Preferred sizes, Diameter, Dimensions, Bend couplings, Radius, Mechanical properties of materials, Physical properties of materials, Underground, Watertightness tests, Test pressure, Performance, Testing conditions, Thermal-cycling tests, Mechanical testing, Quality control, Marking