首先，本文介绍了轨控发动机推力矢量测试原理，及静态标定装置设计方案的选择。
Firstly, measuring principle of the thrust measuring system is introduced, and how to select the design schemes of static calibration.
不能选择操作，选定的操作是当前操作的母轨。
Cannot choose this operator, since the selected operator is a parent of the current operator.
本文介绍了地铁接触轨防护罩的结构设计、原材料选择、制造工艺、性能检测、质量控制等。
This paper introduces the structural design, raw mater ial selection, manufacturing process, property test and quality control method for contact rail protective cover board for Tehran Metro project.
如果是采用推拉门形式，还有固定滑轨、吊轨等多种选择，如果推拉门的五金件不好，时间长了推拉的器件容易损坏。
If the form is the use of sliding doors, as well as the fixed rails, hanging rail and other options, if the sliding door hardware is not good, long time push-pull devices are easily damaged.
其结果可以提供给分光计某些部份的设计以及极轨气象卫星发射时间的选择作参考。
The results may be of reference value to the design of some parts of the spectrometer and to the selection of launching window for polar orbit meteorological satellites.
例如，选择负轨作为地参考也许能够优化一个输出可以至0运放的动态范围。
For example, choosing the negative rail as the ground reference may optimize the dynamic range of an op amp whose OUTPUT is designed to swing to 0v.
从两个方面讨论了低轨卫星在做卫-卫跟踪（SST）观测时，星间隔的选择问题。
The problem of satellite-to-satellite tracking (SST) separation parameter be discussed in two aspects.
在这些模型中并没有一种在任何情况下都是最好的，因此，对于特定轨道选择合适的大气密度模型对提高定轨预报的精度是非常重要的。
Therefore, it is very important to choose an appropriate atmospheric density model for a specific orbit to improve the accuracy of orbit forecast.
这便是笔者选择研讨公务员职位分类轨制作为论文课题的目的所在。
This is why the author chooses the study on the position classification of civil servant as the research subject of this thesis.
这便是笔者选择研讨公务员职位分类轨制作为论文课题的目的所在。
This is why the author chooses the study on the position classification of civil servant as the research subject of this thesis.
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