The three key links are technical links, management links and theoretical link.
三个关键环节是：技术环节、管理环节和理论环节。
In the process of the construction of digital Archi ves resources, this article for the first time summarizes that there exist two channels and three key links.
本文对数字档案资源建设的过程，首次概括为两个途径和三个关键环节。
This paper mainly affect the quality of gas engineering construction design, construction and supervision of three key links and analyze and research, and proposed a series of measures.
本文主要从影响燃气工程建设质量的设计、施工和监理三个关键环节而加以分析和研究的，并提出一系列措施。
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