The paper firstly describes the background and Research Methods of Preferential Rule of Origin.

本文首先阐述了优惠性原产地规则的研究背景和研究的思路。

youdao

The paper firstly describes the background and Research Methods of Preferential Rule of Origin.

本文首先阐述了优惠性原产地规则的研究背景和研究的思路。

youdao