Topviewer is committed to first-class traffic radar products used in intelligent transportation and specializes radar independent research and development, the production and marketing. Topviewer aims to solve traffic problems with jointing governments, enterprises and universities by providing excellent radar products, cost-effective solutions and professional services. Our advanced radar offers good performance and changes China ITS industry by devoting ourselves to improving radar-based vehicle detection at intersections and roadways around China.We also built the large platform for used concrete machinery trading network in China. We acquire a large resource to meet your needs and provide high quality control to provide reliable used machinery.