-凯发k8官网入口

southern section of supercharger oil jining pipeline project

southern section of supercharger oil jining pipeline project发布时间：2013/07/22jining pipeline is connected to the west-east and the second shaanxi-beijing two gas main trunk of contact pipeline bears the important task of gas to the deployment of hebei, shandong, jiangsu, gas supply, as well as th

china national petroleum first construction company

china national petroleum first construction company发布时间：2013/07/22china national petroleum construction company referred to cnpc of a building, established in 1954, the company is located in thirteen dynasties, luoyang city luolong off town. china national petroleum corporation (cnpc) directly

medium oil pipeline material and equipment corporation

medium oil pipeline material and equipment corporation发布时间：2013/07/22medium oil pipeline material and equipment corporation which is founded three decades has created its own unique professional advantages,it has the comprehensive ability to independently undertake domestic and international la