from the surface to the centre

The surface-hardness of the samples increased greatly after the treatment, and decreased gradually from the surface to the centre.

表面硬度随喷丸时间的延长而提高，并且硬度由表面到心部逐渐降低。

The result shows that: the stress/ strain in straightening roller that contacting with the bloom is the largest, and reducing from the surface to the centre of bloom in turn. 3.

研究表明：应力/应变在拉矫辊与铸坯接触处最大，并由铸坯表面向铸坯中心依次减小。

The contents mentioned above will be discussed from the surface to the centre and from the general to the concrete.

以上几个方面是由表及里、由一般到具体的关系。

Main conclusions are described as follows: 1. The dynamic response of cast-in-situ concrete thin-wall pipe pile composite foundation reactes strongly on the horizontal ground surface, and gradually decreases from the centre of the reinforced area to the marginal zone.

论文主要结论如下：1.现浇混凝土薄壁管桩复合地基地表水平向动力反应强烈，由加固区中心向边缘逐渐递减。