Guangzhou Keda Instrument Co., Ltd.

[ Trader ]Main business are Instrument

Shanghai Goldstar Industry Co., Ltd.

[ Manufacturer Trader ]Main business are Highway monitoring instrument

Shanghai Geology Instrument Institute

[ Manufacturer Trader ]Main business are Analysor fo petroleum products

Tianjin Luda Building Instrument Manufacture Factory

[ Manufacturer Trader ]Main business are Civil engineer, building and teaching experimental instruments