在全球市场上具有竞争优势的产业，往往具有明显的区域特征。
The industries with competitive advantage on the global market often have obvious regional characteristics.
区域保护优势：一县城仅限一家，有效的区域市场保护。
Fourth, regional protection advantages: First, only one county, the effective protection of the regional market.
区域保护优势：一县城仅限一家，有效的区域市场保护。
Fourth, regional protection advantages: First, only one county, the effective protection of the regional market.
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