在生产实践中,常常要用到框式水平仪。但框式水平仪的水泡往往受客观条件的影响而与方框错位,修复困难。为了适应生产的需要,我们制成了一种易调水平仪。投入使用三年以来,受到同志们的欢迎,认为它具有调整迅速,制造简单,使用方便等优点。 In production practice, often use the box level instrument. However, the blisters of the box level are often dislocated from the square by the objective conditions and the repair is difficult. In order to meet the production needs, we made a easy to adjust the level meter. Since it was put into operation for three years, it has been welcomed by comrades and considered it has the advantages of quick adjustment, simple manufacture and convenient use.