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1·Field erection work will begin in October this year and complete on June first next year.

现场安装工作将于今年十月开始至明年六月一日完工。

2·Dynamical characteristics of the gyroscope during spin-up and erection procedure, and the influence of the stray magnetic field on gyro's drift and speed attenuation are investigated.

讨论了陀螺在驱动、定向过程中的动力学特性，以及杂散磁场对陀螺漂移和转速衰减的影响。

3·According to field mapping experience of the author, the features of plummet are summarized, and the inspection methods and horse erection skills of the optical plummet are mainly introduced.

根据多年从事测绘外业实践经验，总结测量仪器对点器的特点，重点介绍光学对点器的检验方法及其脚架架设技巧。