中文说明：光传送网和分组传送网的网络规划设计_姚兰
English Description：
Network planning and design of optical transport network and packet transport network_ Yao LAN
Network planning and design of optical transport network and packet transport network_ Yao LAN
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中文说明：光传送网和分组传送网的网络规划设计_姚兰
English Description：
Network planning and design of optical transport network and packet transport network_ Yao LAN光传送网和分组传送网的网络规划设计_姚兰.caj