表面凹坑 meaning in Chinese

surface cavity

Process of crater formation upon electric discharge textured roll surface
毛化轧辊表面凹坑形成过程
Finite element analysis for pits on outer surface of thickwall vessel subjected to internal pressure
内压厚壁容器外壁表面凹坑应力场有限元分析
In this article , the reason how the friction produces in the process of metal forming was analyzed , and the friction was thought to be mainly caused by the plastic flow of metal in the pits of tool surface
本文从微观入手对金属压力成型过程中摩擦的形成原因进行了分析，认为摩擦主要是由于被压入工具表面凹坑金属的塑性流动所引起的。
In this article , the reason how the friction produces in the process of metal forming was analyzed , and the friction was thought to be mainly caused by the plastic flow of metal in the pits of tool surface
摘要本文从微观入手对金属压力成型过程中摩擦的形成原因进行了分析，认为摩擦主要是由于被压入工具表面凹坑金属的塑性流动所引起的。