☆Sewage pipe network engineering in Longkou Economic Development Zone
☆Sewage pipe network engineering in coastal region project zone of Weifang
☆Sewage pipe network reform engineering of Xinxiang County
☆Sewage pipe network reform engineering of Ye County
☆Sewage pipe network reform engineering of Hebi City
☆Sewage pipe network reform engineering of Hua County
☆Sewage pipe network reform engineering of Ningling County
☆Sewage pipe network reform engineering of Yuanyang County
☆Sewage pipe network reform engineering in Beiyuan Road of Jinan City
☆Sewage pipe network reform engineering in Beiyuan Road of Jinan City
☆Sewage pipe network reform engineering in coastal region project zone of Weifang
☆Sewage pipe network reform engineering in urban area of Ling County, Dezhou
☆Sewage pipe network engineering in urban area of Ling County, Dezhou
☆Sewage pipe network reform engineering for Wugang Zhongjia Mining Industry Development Co., Ltd.

Double-wall corrugated pipe engineering