This paper expounded all technical difficult points in detail and special handling methods, including how to replenish the low frequency and draw the wavelet.

文章详细阐述了应用中的各项技术难点以及对数据进行特殊处理、补充低频、提取子波的方法。

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Finally, the paper raises the contents to research on and difficult technical points to resolve.

最后，提出了实现这一目标所要研究的内容和拟解决的技术难点。

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However, at building construction process the technical points of concrete pouring tends to be overlooked and its quality is difficult to control.

然而，在建筑施工过程中混凝土浇筑的各个环节中技术要点往往被人忽略，其质量问题较难控制。

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