We could divide the value chain into five layers: 1 equipment manufactures, 2 service providers, 3 network constructor, 4 telecom carries, 5 end users.
从上游产业到下游产业，可以将通信市场分为如下5层：1设备制造商，2电信服务提供层，3网络建设商，4电信运营商，5最终用户层。
We could divide the value chain into five layers: 1 equipment manufactures, 2 service providers, 3 network constructor, 4 telecom carries, 5 end users.
从上游产业到下游产业，可以将通信市场分为如下5层：1设备制造商，2电信服务提供层，3网络建设商，4电信运营商，5最终用户层。
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