Qinhuangdao is a potential center of the Bohai Sea economic circle.
秦皇岛是最具有发展潜力的环渤海经济圈中心地带。
According to gradient analysis results, proposes that the economic cooperation among the cities in Bohai sea surrounding economic circle can take dual-core, circle, axis pattern.
根据梯度分析的结果，提出环渤海经济圈城市之间的经济合作可以采取双核—圈层—轴带的模式。
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