在岛城的地下铺设了大量的燃气管道，输送的天然气供给千家万户。为了保证供气安全，岛城一直都在对老旧燃气管道进行改造，目前已经进入了收官阶段，只剩下最后150公里，就将全部改造完成。 岛城燃气管道大...
in the underground castle laying large quantities of gas pipelines conveying natural gas supply millions of households. In order to ensure the security of supply, the castle has been in the transformation of the old gas pipeline, has now entered the closing stages, only the last 150 kilometers, will all the transformation is complete. Daocheng gas pipeline...
