Injuries caused by contact measurement instruments commonly used indicator to measure the inner diameter of the inner diameter of the cylinder when the hydraulic cylinder manufacturers, measuring friction side edge contact is inserted in the wall of the cylinder bore hydraulic cylinders, measuring contacts and more wear-resistant hard for Gao hardness quality alloy. Line with the slide-ring seal on the wrapping part will not cause any effect, but will cause a one-way valve cylinder action ineffective or cause cushion valve can not be adjusted in the end; on the circuit, it may cause valve, overflow and pressure reducing valve action failure. Specializing in the production of hydraulic cylinders, hydraulic power Long (certified), hydraulic cylinders supplied by Dezhou City, Long force hydraulic machinery plant. Long Dezhou City of hydraulic machinery plant (www.longliyy.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. Long hydraulic force in leadership with the staff warmly welcome all inquiries negotiations to create long hydraulic force a better future.