Guangzhou Panyu District Guangdong Metering Pumps Water Supply and Drainage Design Environmental Technology Environmental Engineering Environmental Treatment Shi Zheng Gong Yong Engineering Gong Ye Fei Gases Processing Energy Saving and Environmental Protection Hua Gong / Chemistry Shui Chu Li Wei Hu Municipal Engineering Water Treatment Technology 高新技术企业 科技型中小企业 省级高新技术企业 省科技型中小企业 省级创新型中小企业 专精特新小巨人企业