These artifacts must always be at hand before, during and after a project, because they offer a primary point of reference for planning, design, implementation, maintenance, and optimization methods.
在项目开始之前、进行期间以及结束之后，这些工件必须始终记在心里，因为它们提供了规划、设计、实施、维护及优化方法参考的要点。
The result of this project may be a good reference for other projects and on the other hand it will probably be beneficial to promoting design quality in ventilating systems.
其研究成果可以用于其他工程设计项目，对提高我国通风除尘系统的设计质量有一定的现实意义。
It provides a way for design and calculation of thread connection in engines and gives reference to the practical application of related project.
该方案为今后发动机的螺纹联接设计和计算提供一条可行的路径，且对相关的工程实际应用具有很强的指导意义。
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