This paper uss the factor analysis to evaluate and compare the intensive land use of the urban built-up areas of 17 cities in Shandong province.

本文运用因子分析法对山东省17个地级市建成区的土地集约利用状况进行了评价和比较。

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By electronic microscope analysis, it is found that there is a certain amount of second dispersed phase in the martensite matrix which is the metallurgical factor of forming built-up edge.

通过电镜分析，发现在马氏体基体上有一定数量的弥散的第二相存在是引起积屑瘤产生的冶金因素。

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