... and long working life,used widely in every application below.1.auto pressure brake system2.anto power turning system3.auto brake ... and long working life,used widely in every application below.1.auto pressure brake system2.anto power turning system3.auto brake ... reach 9 kg/cm2 when permit safe coefficient is 4:1,while temperature is 50°Cperformance with anti oil,anti abrasion ...