building architecture and engineering thin line icons - editable stroke - 藍圖 幅插畫檔、美工圖案、卡通及圖標建築業, 建築地盤, 建築物外觀
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. - 藍圖 個照片及圖片檔建築地盤, 建築業, 工程師
