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1·Multilateral Tariff Negotiation and Multilateral Tariff Concession -are the forming of custom unions always increases members' welfare?

多边关税谈判与关税减让——关税同盟的缔结一定会提高成员国的谈判地位吗？

2·During the concession negotiation of toll road, one of the core problems is tariff determining and regulating.

在收费公路特许经营谈判过程中，通行费价格的确定和调整是核心问题之一。