Research purposes: The necessity of construction is an important part of project management.
研究目的：项目建设的必要性是项目立项阶段的一个重要部分。
This definition is valid for the purposes of quality management system standards.
本定义适用于质量管理体系标准。
This definition is valid for the purposes of quality management system standards.
本定义适用于质量管理体系标准。
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