Summary of the 21st International Plastic Pipeline ConferenceThe 21st International Plastic Pipeline Conference （PP XXI） was ···

In the past decade, Beijing Gas Group has completed the renovation of 672 kilometers of old underground pipelines and 180000 ···

On November 26th, with the active participation and strong support of relevant units, local party associations （conferences），···

On May 25th, the Central Committee of the Communist Party of China and the State Council issued the Outline of the National W···