In the department of chemical and oil production, raw materials, semi-finished products and finished products are liquid, and the raw material, semi-finished products and finished products need to go through complex processes, pumping play in these processes for conveying liquid and provide the role of the pressure of the chemical reaction flow, in addition, also used in many gear pump to adjust temperature. In the agricultural production, pump is the main drainage and irrigation machinery. A vast in the rural areas, rural every year need a lot of pump, general agricultural pump more than half of the total pump production. In the mining and metallurgical industry, pump is the most used equipment. Mine need pump drainage, in mineral processing, smelting and rolling process, the need to pump water supply, etc. In the electricity sector, nuclear power plants need nuclear main pump and secondary pump, pump, thermal power plant requires a lot of boiler feed water pump, condensation water pump, oil and gas and ash mixture pumps, circulating pumps pump, etc. In the construction of national defense, aircraft flap, stern rudder and the adjustment of the landing gear, warship and tank turrets。