Besides, key construction technologies are introduced in detail, such as machinery selection, tower installation, measurement, welding and antenna mast installation.
详细阐述机械选型、塔楼安装、测量技术、焊接技术和天线桅杆安装的施工工艺和关键技术。
As one of the key technologies of the virtual city construction, virtual GIS has been a hot study area in the current research field of GIS.
虚拟GIS作为虚拟城市建设的关键技术之一，已经成为当前GIS研究领域的研究热点。
The thesis deals with a theory and some research on key technologies of construction control of PC cable-stayed bridges. A software for general use is also developed.
本文的研究对象是混凝土斜拉桥的施工控制系统，主要工作是施工控制的理论与核心技术的研究以及施工控制系统软件的开发。
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