4, mutual comparison method. It compares to reveal differences in the number of economic indicators between each other through economic indicators, either vertical comparison of the current above the hydraulic motor parts, can also be laterally industry comparisons between different enterprises hydraulic motor maintenance, can also contact standard values. By comparing identify gaps. And then analyze the reasons for the formation of gaps. 5, the mathematical model method. In modern management science in the hydraulic motor repair, the mathematical model is widely used, especially in the economic forecasting and management work, because it is not experimental verification, usually by a mathematical model to analyze and predict the results of economic decisions that may arise from. Five more quantitative analysis, ratio analysis is based on trend analysis, structural analysis methods and comparative analysis is an extension of the mathematical model law represents the development direction of the quantitative analysis. Mainly used in hydraulic systems, construction machinery vehicles, such as excavators, hydraulic pump motors, loaders, refuse vehicles and so on. Also used in a variety of pumps, such as: high-pressure plunger pump, reverse osmosis pumps, injection pumps, large-scale high-pressure pump, injection pump, high pressure slurry pump, pump gas drilling atomization, pressure injection pump, high-pressure water gun, oil drilling pumps, diesel driven pump, the three high-pressure plunger pumps, mills and phosphorus removal pump, high pressure fire pumps, desulfurization and denitrification pumps, high pressure cleaning pumps, chemical pumps, and so on. Hydraulic motors agents, crystal create a hydraulic (certified), a hydraulic motor provided by the Jinan Jing Chong Hydraulic Machinery Co., Ltd .. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) Shandong Jinan, mining machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. In the crystal creating hydraulic leadership with the staff warmly welcome all inquiries negotiations to create the crystal creating hydraulic better future.