Anhui Tongguan Machinery is located in Tongling City of Anhui Province, which is Economic and Technological Development Zone. It is on the beautiful and rich southern bank of The Yangtze River. Tongguan Machinery is a scientific research integrated high-tech nterprice which is owned by Tongling Nonferrous Metals Group Co., Ltd. And co-owned by Beijing Research Institute of Mining, Changsha Research Institute of Mining and Anhui Guaranty Group Co., Ltd. Tongguan Machinery is the first developer and maker of ceramic filter in China and also one of the earliest manufactures of high pressure ring submersible drilling rigs and underground vehicles.