In addition, some signs in the location of the problem, such as large objects or buildings, trees and other cover, it will give people a lot of trouble.

另外，有些标识牌在位置上也存在问题，如被大型物体或者建筑、树木等遮挡，也会给人们带来很大的麻烦。

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If shield currents are not returned properly, they can show up in a remote part of the system and perhaps cause trouble in a location totally unrelated to the shielding problem that was "solved."

如果屏蔽层的电流返回路径设计不当，这部分电流将会影响分开布置的系统部件，并且可能引发故障，而故障出现的位置可能与“看似完好”的屏蔽层相去甚远。

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