The company's products are mainly military-grade professional equipment, specializing in high-reliability communication, monitoring, control and measurement technology. The products involve railway system, oil field system and coal mine system. Among them, the main products are: universal locomotive radio for wireless train dispatching, GSM-R locomotive integrated wireless communication equipment, special operation monitoring device for rail cars, safety monitoring system for large-scale road maintenance machinery, CLSZ-I electronic driller device, YJ series oil well three-phase flow metering device, KJ222 coal mine underground positioning system, etc. Company address: No.30, Tang Wan Road, Xihu District, Hangzhou Postal Code: 3100/kloc-057 1-85023055 Telephone number: 057 1-85 124066.