How to operate mobile container ramps?

 How to operate mobile container ramps?

Container ramp is the best tool for loading/unloading cargo from container or truck.
But how to operate it?It is very easy to do. Just follow these steps:

1. Press the hand shank to lift it up to the floor of vehicle.

2. Vehicle is in place.

3. Loosen the oil return valve and it climbs down. Make sure that the lip board of loading
    ramp smoothly laps joint from a vehicle in the tail.

4. Begin to work.

5. After working, loosen the fixed chains, press the hand shank to lift it up, the vehicle is
    driven away and the dock leveler resets.

6. Limbing up its tail, hang in the truck to move.