The characteristics of surface engineering information system, the updating and maintenance syst…

同时介绍了地面工程应用体系、更新维护体系和用户体系。

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Does this answer your question during our visit. The design engineers in the US need to see several samples to give final response on your question of the flat surface and before updating the drawing.

我们的访问过程中这个一直在回答你的问题。美国设计工程师需要看一些样本，对你们的肤浅问题和更新图片之前给予最后的答复。

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So says Peter Ruane, chief executive of the American Road and Transportation Builders Association (ARTBA), as he unveils a 70-page plan for updating legislation on federal surface transportation spending.

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