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战略性关键金属贸易网络特征及其对产业结构升级的影响
朱学红1,2(), 彭婷1, 谌金宇1,2()
Impact of strategic and critical metals trade network characteristics on the upgrading of industrial structures
ZHU Xuehong1,2(), PENG Ting1, CHEN Jinyu1,2()

图1. 1996和2017年全球战略性关键金属贸易网络
注:每个节点代表一个国家,用黑色标签标注。两个点之间的箭头代表基于贸易关系的贸易流动方向,贸易额的大小由线条的粗细表示。

Figure 1. Global strategic and critical metals trade network, 1996 and 2017