Three to focus on grasping the key points, difficulties, strict control of technical risk.
三要突出抓重点、难点环节，严控技改现场风险。
Thinking over the topic carefully and forming a clear conception fulfil the function of pointing the direction, fixing a position and grasping the key points in writing a composition.
审题立意在作文中起定向、定位、定重点的作用，是决定文章质量高低的关键性一步。
Points out that the key to the construction is grasping the process and install technology wing-piece accurately and precisely.
指出准确、精密掌握翅片加工和安装工艺是施工的关键。
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