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一、两年前,DDN不仅费用昂贵,而且审批、施工周期长,相反微波联网不仅施工简单,安装迅速,而且计费合理,因此风靡一时。但随着DDN价格下调——
One or two years ago, DDN was not only expensive, but also approved and had a long construction period. On the contrary, the microwave networking was not only simple in construction but also quick in installation and billing, making it all the rage. But with DDN prices down -