3) two-tier system
双层系统
1.
By sectorizing a cell,the system capacity can be further improved,and introducing a hot-spot two-tier system into a sector can obviously improve the capacity of the sector.
通过在小区中划分扇区能进一步提升系统容量,在扇区中又引入双层系统,可以显著提高该扇区内容量。
5) double layer-system wall
双层墙体系
1.
The form of the double layer-system wall made by small-sized hollow concrete brick is introduced as well as its design and calculation principles.
介绍了混凝土小型空心砌块双层墙体系的形式、设计与计算原理,列举了设计实例,论述了其在设计和施工时应注意的事项,阐明了混凝土小型空心砌块的推广优势。
6) double deck system
双层次体系
补充资料：系狗当系颈
1.比喻办事当抓住关键。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条