Changsha Changsha County Hunan No.8 Energy Saving Technology No.10 Tunneling Engineering No.13 Wood No.14 Di Ji Ji Chu Engineering No.14 Tu Mu Engineering No.15 Concrete No.18 Cheng Shi Fa Zhan No.18 Road Road and Bridge Beam No.19 Di Ji Ji Chu No.20 Ji Chu Facilities Construction No.20 Engineering Detection No.20 Steel Structure Construction 高新技术企业 科技型中小企业 省级高新技术企业 国家专利 省科技型中小企业 计量认证