sewer tunnel workers examines system damage and wastewater leakage |
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| navigate by keyword : abandoned channel concrete danger dirty drain drainage draining ecology environment flooded flow flowing human industrial inside labor leak leakage man manhole mounter outflow person pipe pipeline poison pollution professional protective repair round safety service sewage sewer sewerage smelly stink stream toxic tube tunnel tunneler underground uniform wastewater water work worker |
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| Sewer tunnel workers examines sewer system damage and wastewater leakage. |
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