Commodity information： Material: Plastic/Plastic Can DIY: Yes Packing method: color box Ability development: intellectual development Science and Education Toy Type: Physics Applicable age: Juvenile (7-14 years old) Hydraulic power principle: The hydraulic principle (HYDRAULIC SYSTEM) refers to the use of In a closed container, using the incompressibility and force transmission of the liquid Conductivity, when the inner wall of the container is under pressure, any -The pressure on the premises is equal and will be transmitted equally Pressure to all parts. Is to use this principle to be water --When one end is under pressure, it will transmit the pressure to the other side. Drive each joint of the arm to produce action.

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