The traditional methods, such as optical reference method, enclosed rulermethod, are hard and dangerous to operator, and their measuring efficiency is low.
通常采用的传统测量方法，如光学参比法和围尺法，其操作者的劳动强度大，操作危险，测量效率低。
2
To fold a method, click the - icon on the left ruler.
要折叠一个方法，请单击左侧标尺中的-图标。
3
Correction is among the components of the mutual position and function of correction, correction method: ruler correction, correction of square, optical correction and so on.