为了满足用户的需要和便于长途运输，我们已研制了粉状粘稠剂，并开始生产，在工程中应用。
In order to meet the needs of users and facilitate the long-distance transportation, we have developed a viscous agent, and begin the powdery production, applied in the project.
波分复用尤其是DWDM技术能极大拓展带宽，在长途干线上得到广泛应用，而在短距离传输中，CWDM由于其一系列特点已越来越引起人们的重视。
WDM especially DWDM is widely used in long haul network because it can extremely expand the band, however in short haul area CWDM is paid attention to be cause its properties.
密集波分复用(DWDM)技术在长途通信中已经得到了广泛的应用，但其高昂的系统成本极大地限制了它在城域网中的应用。
DWDM technology has been widely used in long-distance communications, but its high system cost has greatly limited its application into metro area networks (MAN).
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