According to metrological characteristics of diffraction grating, the measurement error models are built up and the equations between installation and measurement errors of grating are deduced.
根据衍射光栅的计量特点，建立了正交衍射光栅测量误差模型，推导了光栅安装误差与测量误差之间的关系。
The main bridge type crane, the erection and assembly has strict technical requirements, and a set of measurement methods to measure the installation result strictly.
桥架式桥式起重机的主体，其架设和组装都有严格的技术要求，并有一套严格的测量方法来测量安装结果。
Before installing the positioning forms and bolts, the measurement team shall first set the basic axes lines and control levels, based on which installation is to be proceeded.
安装定位模板及螺栓时，由公司测量班投设基础轴线及控制标高，然后以此为准进行安装。
应用推荐