Dapu Communication Technology Co., Ltd. gets "Dapu Communication" for short,concentrate development,manufacture and sale together.its a high-tech enterprise which general dept. sets up in industrial manufacture city of Dongguan,with total investigation 120 million, it has six branch countrywide,and got lots of new product's patent and national innovation items. The company passed ISO9001:2000 quality system quthentication.The major products of company are high-stability oscillator(High-stability Crystal oscillator for short).1 constant temperature crystal oscillator series; 2 digital temperature complementarity oscillator(TCXO) series; 3 VCXO-Voltage Control X-tal-Oscillator series, 4 Surface paste oscillator series. Company products are used in correspondence devices station,exchanging device,meeting webnet device,railroad signal,GPS satellite communication orientation device,clock frequency mark device, industrial automatization control,aviation,spaceflight and war insutry area etc.