Bearing parts in the process of hardening cooling by internal stress due to the formation of quenching cracks crack said.
轴承零件在淬火冷却过程中因内应力所形成的裂纹称淬火裂纹。
2
The paper describes the feature, mechanism of formation, research methods and possible applications of jet halo of mobile heavy metal above oil bearingformation.
叙述了石油层上方重金属元素的射流晕分布特点、形成机制、研究方法及其可能的应用。
3
Jurassic coal-bearingformation scatters over the northwestern China. The low-permeability sandstone reservoir occurs as the main reservoir type.