China will build and upgrade around 770,000 km of urban underground pipelines during the 15th Five-Year Plan period (2026-2030), an official said Monday. | Collector
China will build and upgrade around 770,000 km of urban underground pipelines during the 15th Five-Year Plan period (2026-2030), an official said Monday.
China will build and upgrade around 770,000 km of urban underground pipelines during the 15th Five-Year Plan period (2026-2030), an official said Monday.