Changbei project is a joint venture project for natural gas development between PetroChina and Shell.
长北气田是中国石油与壳牌公司合作的天然气开发项目。
The development and research on the citation plastic shell was reviewed in this paper.
概述了题示塑料壳体的开发研究工作。
This paper sets a project required by the development of Shell.
本论文根据壳体研制需求立项。
This paper sets a project required by the development of Shell.
本论文根据壳体研制需求立项。
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