คุณลักษณะ

• When the rubber part of the instrument is pressed against a plate, etc., and the movable grip is triggered, the inside of the rubber part becomes close to the vacuum.
• Since the pressure difference between the inside of the rubber and the outside air pressure increases, it becomes impossible to pull away, and the board can be lifted as it is.
• In addition, it is possible for two people to pull each other by using two units of this instrument and inserting a board between them, so that more dynamic atmospheric pressure experiments can be performed.