The power cylinder absorbs oil from the fuel tank and injects the working oil cylinder with manpower.

The working oil cylinder goes up and makes the platform rise.

When the working cylinder reaches the highest level, or the overloaded road pressure exceeds the rated value, the effect of the overflow valve

Open the discharge valve, and the hydraulic oil in the working cylinder will flow back to the tank under the action of gravity.

The working cylinder is going down, and the platfo