The urban land grade system used in China has been developed over ten years.
我国推行城镇土地分等定级制度已有十多年的历史。
This research selects factors according to the demand of urban land grading and section otherness in research area and sets up factors system effecting urban-grade between cities;
根据城镇土地分等的要求和研究区的地域差异性选择因素因子，从而建立影响城镇间土地等的因素因子体系；
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