本文首先介绍这些新技术和新变化，并重点就一些关键技术问题进行分析。
This article firstly describes these technologies and new changes, and then analyzes some key technology issues.
介绍了新研制潜液泵的结构组成和工作原理，论述了研制中对关键技术问题的分析和解决。
The composition and working principle of newly developed submerged pump was introduced, the resolution of key issues in development of submerged pump was analyzed and discussed.
分析了GIS在开采沉陷领域应用的关键技术问题。
The key technology of GIS when applying in the field of mining subsidence is analyzed, too.
应用推荐