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Yangzhong Changfeng Instrument Valves Plant is professional in  manufacturing of various automatic control connections, for example, high-pressure and low-pressure instrument valves, engineering machinery used high-pressure pipe connection, hydraulic machinery used high-pressure pipe connection, tri-valve set, 5-valve set. And they are widely applied in oil refining, chemical, electric power, mechanical, medical and aviation industries due to brand new structure, high reliability and fine sealing performance. Our products are popular in both domestic and abroad market. And they are highly praised by users. We expect to cooperate with all colleagues.