the company has an experienced and rigorous professional r & d and production team, including five registered engineers, fifteen senior title engineers, thirty mid-level titles engineers, and more than 200 professional and technical staff. 35 patents have been obtained in the field of exhaust gas and dust removal. our r & d investment is increasing every year. 10% of the annual sales revenue is r & d expenditure. we are committed to developing high quality, energy saving and environmental protection equipment.