Hydraulic, pneumatic and sealing industry development process of hydraulic, pneumatic and sealing industry development process can be divided into three stages, namely: the early 1950s to early 1960s infancy; 60 to 70 years for specialized production system growth stage; 80 to 90 years of rapid development stage. Which cylinder supply manufacturers, hydraulic industry in the early 1950s, the Soviet Union's imitation grinders, broaching, lathes, hydraulic transmission start copying cylinders, hydraulic components produced by the machine tool industry from plant hydraulic workshop production, production for own consumption. By the late 1960s, early 1970s, with the development of mechanization of production, especially in the second car factory to provide efficient, non-standard fuel tank design driven automated manufacturing equipment, hydraulic components manufacturing has experienced rapid development of the situation , a group of SMEs has become a professional manufacturer of hydraulic components. Indirect measurement of the hydraulic cylinder through the use of three points defining a circle principle, any measure three points on the circumference of the hole measured coordinate values, and then follow an arbitrary point on the circumference to the center distance between the same geometrical principles, according to the mathematical Three calculation methods to determine the correlation of a circle, find the center coordinates of non-standard fuel tank, and back calculate the pore size and other relevant parameters. Generally have a special measuring instruments to measure the jaw. Such methods can be calculated directly enter the program on your computer to obtain high efficiency, small errors can be used for online testing, but there are some limitations, not flexible non-standard cylinders, quality speed hydraulic (certified), the fuel tank from Texas City German city of hydraulic equipment plant to provide quality speed. Dezhou City mass-velocity hydraulic machinery plant (www.dzzhisu.com) (www.dzzhisu.com) is a leader in Dezhou, hydraulic equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Speed ??hydraulic leadership in quality with the staff warmly welcome all inquiries negotiations to create a better quality speed hydraulic future. You can also access (www.dzzhisu.com/supply_details_44700350.html), for more information about the company.