Ключевые слова:
Manholes, Gullies, Drainage, Surface-water drainage, Construction systems parts, Roads, Design, Dimensions, Grades (quality), Slots, Test specimens, Quality control, Quality assurance, Statistical quality control, Marking, Loading, Deflection tests, Position, Type testing, Certification (approval), Inspection, Cast-iron, Cast steels, Concretes, Reinforced concrete, Rainwater control systems