oil refinery plant, chemical factory, oil and gas industrial zone, oil pipeline with valves in large oil refinery - 管道 個照片及圖片檔天然氣, 工廠, 原油
stationary or technical unrecognizable engineer turning on off vent of gas pump - 管道 個照片及圖片檔天然氣, 氣體, 汽油
detail of giant blue-colored water pipes, a peculiar system used to pump away ground-water from flooded foundations of construction sites. - 管道 個照片及圖片檔天然氣, 原油, 氣體
a female engineer used a measuring instrument to measure the quality of steel pipe - 管道 個照片及圖片檔建築地盤, 建築業
steel pipelines equipment pump at modern factory, steam pipe and supply system for industrial - 管道 個照片及圖片檔工業, 氣體, 運輸
female and male piping system engineers working at the pipeline construction in the refinery or chemical plant at an industrial estate - 管道 個照片及圖片檔天然氣, 氣體, 發電廠
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 個照片及圖片檔建築地盤, 建築業
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 個照片及圖片檔建築地盤, 建築業, 工程師
industrial refinery complex with intricate metal pipes and structures in pittsburgh pennsylvania - 管道 個照片及圖片檔天然氣, 汽油, 工廠
a focused welder uses welding equipment while working on a pipeline inspection - 管道 個照片及圖片檔天然氣, 原油, 汽油