Conserve energy because Hydro could suck water removal from power is spinning in the drive the car forward. Then release the high pressure water from the car, the car floats and can continue by car not drowning.
Save energy because they can absorb the energy of water was blended into energy to propel the car forward. After the release of pressure from the car makes the car blew up and continue with the trailer jack.
Energy saving water can drain the water, because the car to spin a power in the drive รถไปข้างหน้า movement. After the release high pressure water from the car to the car float and can drive the car not drowned.