The piston ring is an opening loop or a grading ring which is convenient to disassemble and replace.
活塞环为便于拆换的开口环或分段环。
Based on the consideration of the electric field around composite insulators and grading ring, design of the grading ring was given compared with different arrangement forms and different design.
根据绝缘子和均压环表面电场强度控制的考虑，对不同布置方式的均压环配置进行了设计，并对比了不同的均压环设计方案。
Based on the consideration of the electric field around composite insulators and grading ring, design of the grading ring was given compared with different arrangement forms and different design.
根据绝缘子和均压环表面电场强度控制的考虑，对不同布置方式的均压环配置进行了设计，并对比了不同的均压环设计方案。
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