Changtan is a long established professional geological equipments & machinery manufacturer(since 1958), subordinating to Hunan Bureau of Geology and Mineral Exploration and Development and a member of China Geo-Equipment Corporation(CGE). seanatct @ hotmail dot com

主要产品/业务: Drill Rigs, Mud Pumps, Drill Rods, Drill Bits and other accessories for geological drill rigs.