External engineering networks installation and maintenance works

Testing and commissioning maintenance (1), Gas pipeline construction maintenance (1), Electric vehicle charging station maintenance (1), Electricity and communication network maintenance (1), Outdoor lighting network maintenance (1), Stormwater and drainage system maintenance (1), Connection to centralized networks maintenance (1), Heating pipeline maintenance (1), Network reconstruction and repair maintenance (1), Water supply and sewage network maintenance (1), Earthwork (1), Other (1)