Part of the responsibility of the BSD layer in the XNU kernel is making this rough mapping concrete.
在XNU内核中，BS D层的一部分责任就是将这些进行粗略的实体映射。
2
Stainless steel tube surface after sand blasting become rough and very evenly, can enhance the paint adhesion layer on the surface of stainless steel pipe.
不锈钢管表面经过喷砂变得粗糙又很均匀，能增强油漆层对不锈钢管表面的附着力。
3
This paper introduces the realization of specific protocol on each layer, and gives related data structure with rough program process.