In this paper, the principal construction methods and construction technology for...
介绍该桥主桥的主要施工方法及施工工艺要点。
This paper discusses some principal issues in the development of the technology.
本文简要阐述了等高线植物篱的基本概念、类型及主要科学问题；
The operation principal, structure and technical characteristics of this technology are introduced in this paper.
介绍了数控往复式潜油电泵的工作原理、结构及技术特点。
The operation principal, structure and technical characteristics of this technology are introduced in this paper.
介绍了数控往复式潜油电泵的工作原理、结构及技术特点。
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