The impacts of graphene nanosheets content on microstructure, nano-mechanical and tribological properties of the copper matrix composites were investigated. The
The dendrite growth and the associated misorientation evolution on the platform base of a single crystal in-vestment casting were investigated. It was found tha
在大型梁制作的过程中,其张拉技术是比较重要的环节.在张拉的过程中由于其预应力损失、张拉系统的精度与摩阻、工作人员所掌握情况等各方面的直接影响,难以保障其预制混凝土