silhouette of a man standing in the underground drainage system in kiev, ukraine - 下水溝 個照片及圖片檔深色的, 隧道, 一個人
construction worker at the cylindrical tunnel, inspecting it with a flashlight wearing a high-visibility jacket, a white safety helmet, and a harness for safety. the tunnel appears to be part of an underground large infrastruct project. - 下水溝 個照片及圖片檔建築地盤, 建築業
side view of pipeline with red valve. oil, gas or water transportation with blue pipe line valve - 下水溝 幅插畫檔、美工圖案、卡通及圖標污水處理廠
Los Angeles, CA After hearing sounds of LA city sanitation workers using a grinder on the manhole cover just minutes before welding it shut, Luis...
Los Angeles, CA Los Angeles city sanitation workers fits a cover for a storm drain where multiple homeless people have been living near 88th St. And...
