Hydraulic Cylinder China hydraulic cylinder sleeve at all levers have adopted a unique structural design , The overall boss limit ,the overall heat treatment process and advanced process ,with the Sealing structure and advanced process,with the sealing structure and advances suite to ensure That poor working conditions together under high pressure tank will not leak,coupled with Innovative design and a new high - lever limit slip ring material guide ring,the maximum increase of the dump truck's security and stability. To make a smoother lift cylinder ,long service life,users have more confidence.