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。

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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。

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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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This is not simply about diversity at work and equal opportunity, but about getting more lines of communications across job roles and organizational silos.

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We now have 3, 500 kilometers of expressways, all with fiber-optic lines that are the backbone of our communications.

CNN: South Korea and Japan streets ahead in smart transport

When the next-generation communications system comes online, the question is whether the cruise lines will reduce their communications costs to passengers because of the changes in technology or whether they will leave costs as they are but offer a greatly enhanced experience for system users.

FORBES: Cruise Ship Communications for Passengers Is About to Change