在做高一物理（必修）实验“验证玻意耳定律”时，是通过玻意耳定律实验器内所封闭的气体的压强与体积的变化关系验证该定律．在操作的过程中，气体体积和压强的变化是通过在框架的两侧加钩码或者用弹簧秤向上拉活塞来实现的．在用弹簧秤拉活塞时，很难保证弹簧秤始终沿竖直方 In doing a physics (compulsory) experiment “verification Boyle law”, through the Boyle law experiment closed the gas pressure and volume changes in the relationship between the law to verify the law. During operation, changes in gas volume and pressure are achieved by adding hooks on either side of the frame or pulling the piston up with a spring balance. When pulling the piston with a spring balance, it is difficult to ensure that the spring balance is always upright