We are MianYang Tianshun Electronic Technology Co.,Ltd. which locates in west of China---Mian'yang, and specializes to sell complete electronic units including *Fiber Optical Active Devices *Fiber Optical Passive Devices *Transmission Equipment *Instruments & Meters Our products have been widely used in telecom, broadcast, power system, traffic, railway, petroleum, military, education, government etc.area. Our products are not only domestic customer's favourite but also have already been sold as far as America, Europe, Southeast Asia and Africa.