多媒体通信的网络边界穿越技术-多媒体设计 关键词： h.323；网络边界；穿越技术；协议 [gap=486]keywords:h.323;network boundary;crossing technology;agreement
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定向穿越技术是管线铺设过程中先进的非开挖施工技术，具有很多优点。
It has many advantages for directional drill to lay down pipeline and directional drill is an advanced no-excavation construction method.
不足之处在于工程工期较长，因而，施工建设单位在运用这项穿越技术时应设法解决这一问题。
The shortcoming of this technology is that the construction time is relatively long, thus, the unit in charge of construction must try to solve this problem in adopting this crossing technology.
随着风力发电在电网中的比例日益增加，电网对风电机组的要求也越来越高，低电压穿越技术(LVRT)就是其中一项重要指标。
With the proportion increasing of wind power generation in power grid, the power grid demand for increasingly high to wind turbine. Low-voltage through technology (LVRT) is one important indicator.
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