oil refinery plant, chemical factory, oil and gas industrial zone, oil pipeline with valves in large oil refinery - 管道 個照片及圖片檔
detail of giant blue-colored water pipes, a peculiar system used to pump away ground-water from flooded foundations of construction sites. - 管道 個照片及圖片檔
steel pipelines equipment pump at modern factory, steam pipe and supply system for industrial - 管道 個照片及圖片檔
female and male piping system engineers working at the pipeline construction in the refinery or chemical plant at an industrial estate - 管道 個照片及圖片檔
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. - 管道 個照片及圖片檔
construction workers and engineers are working efficiently inside a large metal pipe at a construction site. they are building a new water drainage system in the evening, just before sunset. - 管道 個照片及圖片檔
