The use of frequency division duplex (FDD).
使用频分双工(FDD)。
The duplex melting process by Blast and Medium-Frequency Induction Furnaces for cast iron production has been studied.
对高炉-中频炉双联短流程熔炼生产铸铁件工艺进行了分析研究。
It was investigated that the short-cut process of producing high quality iron castings by duplex melting with blast furnace and medium frequency induction furnace.
分析了高炉中频炉双联熔炼短流程生产工艺的特点，采用液态金属状态测评系统研究短流程铁液状态。
As the only system using Time Division Duplex in the 3g system, it has some advantages over systems of Frequency Divsion Duplex.
作为3g系统中唯一一个使用时分双工的系统，它具备了许多频分双工系统所不具备的优点。
As the only system using Time Division Duplex in the 3g system, it has some advantages over systems of Frequency Divsion Duplex.
作为3g系统中唯一一个使用时分双工的系统，它具备了许多频分双工系统所不具备的优点。
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