Changsha Changsha County HunanNo.5 Liu Ti TechnologyNo.6 Papermaking EngineeringNo.7 Zao Zhi / Zao Zhi Chang / PaperNo.8 Yi Xing MachineryNo.10 Smelting TechnologyNo.11 SmeltingNo.18 Special EquipmentNo.18 Equipment ManufacturingNo.39 Guo Chan ChemicalNo.66 Power SystemsNo.81 Hua Gong / Chemistry Equipment Manufacturing高新技术企业守合同重信用企业省级高新技术企业科技型中小企业省科技型中小企业国家专利ISO9001认证ISO14001认证特种设备生产许可证