Explosion-proof power supply box: converts high voltage to a weak current coupler hose, alternating current into direct current, supply circuit, hydraulic hose coupling control motor, solenoid valve open and close.Vane pump: can convert mechanical energy to the oil pressure, the underground tank of oil suction J: to and discharge pressure and discharge.Separate oil from the oil gas vapor separator side by side into the atmosphere;Filter out the oil little impurity, to ensure that the tanker output is not pure pressure oil containing gas and impurities.Meter: to measure the output of the oil volume, flexible hose coupling and converts the output volume of oil flow meter shaft angular displacement quantity.