However, in coaxial oil-paper combination insulation when the thickness of insulation exceeds a certain value the field strength within the pressboard under polarity reversal will increase instead.

但在同轴油纸复合绝缘中，当绝缘厚度超过一定值后，纸中极性反转场强反而增加。

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However, in coaxial oil-paper combination insulation when the thickness of insulation exceeds a certain value the field strength within the pressboard under polarity reversal will increase instead.

但在同轴油纸复合绝缘中，当绝缘厚度超过一定值后，纸中极性反转场强反而增加。

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