煤炭资源型城市城乡空间结构演变及影响因素——以安徽省淮北市为例
管晶, 焦华富

The evolution process and influencing factors of urban-rural spatial structure in coal resource-based city: A case study of Huaibei city in Anhui province
GUAN Jing, JIAO Hua-fu
图7 淮北市主要工业行业产值占比演变
Fig. 7 The evolution of the proportion of output value of major industries in Huaibei city