They must take the appropriate protective measures in order to avoid over-voltage and over-current generated by the transmission lines of communications equipment and personnel hazards.
因此必须采取适当的保护措施以避免因过电压及其所产生的过电流对传输线路、通信设备和人员造成的危害。
Without qualification, if one had to choose between usual telephone lines or IP telephony for carrying the voice, the first would be a better fit for the needs of voice communications.
未经资格，如果选择了IP电话或一般电话线进行声音、首先是更好的适合话音通信需求。
For years, operators and electric utilities have been looking for ways to leverage the capacity of low-voltage power lines for communications USES.
近年来，操作者和电力公用事业一直在寻找影响通讯使用的低电压电力线性能的方法。
Each of the main lines of trenches was connected to each other and to the rear by a series of communications trenches that were dug roughly perpendicular to them.
每一条大型壕沟之间都是彼此连通的，并且借由与其差不多垂直挖掘的交通壕与后方相连。
Each of the main lines of trenches was connected to each other and to the rear by a series of communications trenches that were dug roughly perpendicular to them.
每一条大型壕沟之间都是彼此连通的，并且借由与其差不多垂直挖掘的交通壕与后方相连。
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