我们与材料和设备供应商有良好的关系，为符合特殊项目的要求我们还设置了专门的部门和IT网络系统以获取最合适的材料。
We have good connection with material and equipment suppliers and have a special department and it network to source materials that are most suited for the particular project.
改造好的网络系统分为核心层、 汇聚层和接入层，中间设置5个汇聚点。
The reconstructed network system is divided into 3 levels of core level, converge level and receiving level.
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