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Recently, the special subject--development and application of rectilinear electromechanical pumping undertaken by Jianghan Petroleum Machinery Factory and China University of Petroleum (East China) Electromechanical Project Institute, which is the component of national key project for domestic petroleum
Recently, the special subject - development and application of rectilinear electromechanical pumping commitment by Jianghan Petroleum Machinery Factory and China University of Petroleum (East China) Electromechanical Project Institute, which is the component of national key project for domestic petroleum