πππ Click on the name card below to pay attention to the source of official account: if the network is infringed, please contact the delete note: the end of the article is attached..
Luanchuan this section of the road is constructed in sections and passes half a width. Please obey the guidance of passing vehicles
[knowledge points] there is a difference between white drawings and blueprints. Can’t white drawings be constructed?
Municipal water supply and drainage pipeline engineering construction diagram, with common problems prevention!