用带橡胶塞的细口瓶配两用气筒装置,代替玻璃罩配抽气机装置,演示容器中的气体对器壁的压强;用模拟气体压强产生专用秤,代替电子托盘秤,模拟气体压强的产生。两个改进的实验装置与课本上的实验装置相比,成本低、易操作、现象明显、趣味性强,用于教学实践后提高了教学效果。 Replace the glass cover with an air extractor unit with a small-mouth bottle with a rubber stopper and a dual-purpose gas cylinder device to demonstrate the pressure of the gas in the container against the wall of the container. A dedicated scale is generated by the pressure of the simulated gas instead of the electronic pallet scale, The production. Compared with the experimental device on the textbook, the two improved experimental devices have the advantages of low cost, easy operation, obvious phenomena and strong interest, which are used to improve the teaching effect after the teaching practice.