Product use and characteristics: Used in gas-liquid combined braking to convert input gas energy into output liquid energy as a force multiplying device. ①Smooth braking: gas-over-oil braking system can achieve smooth braking and reduce vehicle shock and vibration; ②Response speed: fast response speed, rapid generation of braking torque; ③Large displacement: it can meet the large specification and large fluid demand brake; ④Easy maintenance: relatively simple structure, easy maintenance.