... pressure:35MPa,52.5MPa,70MPa medium:oil,gas,water, drilling hydraulic manifold drilling valve group working pressure:35MPa,52.5MPa,70MPa ... medium:oil,gas,water,mud union,flange drilling hydraulic manifold drilling valve groupdrilling hydraulic manifold drilling valve group working pressure:35MPa,52 ... .5MPa,70MPa medium:oil,gas,water,mud union,flange drilling hydraulic manifold drilling valve group