For cutting-edge issues for whole life cycle design, 7 research directions were provided.
针对全寿命周期设计的前沿问题，提出了现阶段的7个研究方向。
The main contents of whole life cycle design for mechanical system were fully described from 8 aspects.
从8个方面全面阐述了机械产品全寿命周期设计的主要内容。
Build the framework system of whole life cycle design for mechanical system; provide the reference for whole life cycle design for mechanical system.
搭建机械系统全寿命周期设计的框架体系，为机械产品全寿命周期设计提供可以参考的依据。
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