你必须有设备能展开帆并且不会打卷——这是目前还没有做到的一项大型工程。
You have to get equipment for unrolling them and stretching them - a big piece of engineering that's not been done.
楼“的历史直升机工程部，麦克唐纳飞机公司”杂志美国直升机学会，第二卷。
Roever, F. , "History of the Helicopter Engineering Division, McDonnell Aircraft Corporation, " Journal of the American Helicopter Society, vol.
水电建设项目工程档案的分类方案与档号编制，是工程文件归档整理、组卷的关键问题之一。
For hydropower construction projects, achieves classification and number preparation is a critical issue in sorting-out and voluming of project documents.
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