คุณลักษณะ

• This is a transparent acrylic plastic cylinder with a rubber membrane stretched like a drum at both ends and an L-shaped acrylic tube attached in the middle (the L-tube can rotate 360 °).
• When the L-tube is held in the hand and the machine is placed in a water reservoir filled with water, the rubber membrane on both sides is pushed and dented by the water pressure.
• Also, if the drum part is placed vertically in water, the rubber film at the bottom will make a big dent, and the rubber film at the top will make a small dent.
• It is a laboratory that can experience water pressure and observe it visually.