在建筑施工中,使用水准仪进行抄平的工作量比较大。过去抄平一般采用水准尺,也有采用画有红线的木条子,上下移动木条子,使仪器的横丝正切在红线上,而后在木条子底部画线的。这两种方法的缺点是费工时,而且容易产生误差, In construction, the use of a leveling instrument for copying is relatively large. In the past, the leveling ruler generally adopted a leveling rule, and there were also wooden slivers painted with red lines. The wooden slivers were moved up and down so that the transverse threads of the instrument were tangent to the red lines, and then the lines were drawn at the bottom of the wooden slivers. The disadvantage of these two methods is that they are time-consuming and they are prone to errors.