The measurement control and orientation check method to the sink of the steel suspension-box are studied, and analyzed the orientation check precision.
研究了大型钢吊箱沉放定位过程中的测量控制方法与定位检测方法，并对定位检测精度进行了分析。
In order to improve the manufacture precision, on-line measurement and control system should be set up in the pipeline product line.
为了提高内镶式滴灌管加工和打孔精度，需要建立在线检测和控制系统。
A detailed description on the arrangement of the top level and encoded control reference frame and a precision analysis on the measurement of figure cadastration have been presented.
对数字地籍测量中首级及加密控制网的布网形式及精度作了较详细的介绍及分析。
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