Ключевые слова:
Planning|Structural design|Watertightness tests|Visual inspection (testing)|Hydraulic tests|Occupational safety|Underground|Drainpipes|Electrical testing|Drainage|Safety measures|Sewers|Performance testing|Buildings|Pipelines|Design|Environmental testing|Sewerage|Sewage engineering|Mechanical testing|Hazards|External|Chemical-resistance tests|Leak tests|Waste disposal engineering