目前许多韩国公司使用含银或者铜的导电涂料，它们主要是从美国进口的。
Currently many Korean companies use the conductive paints comprising silver or copper, which are mainly imported from America.
主要优点是与这些类型的交换机是压降，它在开展和非导电国，是最理想的零。
The major advantage with these types of switches is that the voltage drop across it during conducting and non-conducting states, is ideally zero.
绝缘片的面积大小是影响有缺陷碳纤维混凝土导电性能的最主要因素，绝缘片的位置和数量对其影响较小。
The major element that affects the electric conductivity of defected carbon fiber is the area of insulation sheet, by contrast, its position and number have little influence.
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