The proposed method was verified by a simple model, which has analytical solutions, and used to analyze the pr process of a typical oil-paper insulation structure of converter transformer.

通过一个有解析解的双层有损同轴绝缘结构模型，验证了方法的有效性。最后，分析了一个换流变压器阀侧绕组典型绝缘结构的极性反转电场变化过程。

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"We've invested in PR and marketing advisers to take us through the process and obviously we've invested in the manufacturing of quite a large number of tubes ready for the launch, " he said.

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