日韩视频一区-超碰精品-一区二区免费看-国产一区在线看-欧美网站在线观看-亚洲色图久久-日本视频在线免费观看-秋霞啪啪片-午夜影院试看-婷婷调教口舌奴ⅴk-日本xxxxxxxxx69-男男啪啪网站-操女人逼逼视频-亚洲国产精品999-国产综合影院

　　Changde five counties and one city natural gas transmission and distribution pipeline project, by Hunan Hunan and Jiangxi Three Gorges gas investment limited liability company construction, the project is a total length of 245.9 km pipeline, design pressure 4.0 MPa, the design of the largest annual gas transmission capacity of 442 million cubic meters , The construction of a total of three cathodic protection station, the station cathodic protection by our company construction. Line cathodic protection materials, site cathodic protection materials provided by our company.