Drilling platform is a necessary equipment for offshore oil exploitation, and various hydraulic cylinders are needed to realize the lifting and sliding of the platform. Hengcai has the ability to design and manufacture lift cylinder, slip cylinder and piston accumulator. Advanced plasma spraying and supersonic flame spraying technology can enable our cylinder to withstand the harsh marine environment. After years of practice, the sealing design can effectively prevent water and other dirt from corroding rod seals of piston rod.