The piston ring is an opening loop or a gradingring which is convenient to disassemble and replace.
活塞环为 便于拆换的开口环或分段环。
2
The ratio of voltage warp(RVW) for the varistor is defined to simulate a polynomial of every diameter and suspended heights of the gradingring.
定义了阀片电压偏差率并以此为目标函数，建立该目标函数与各均压环环直径和悬挂高度的拟合多项式关系。
3
Based on the consideration of the electric field around composite insulators and gradingring, design of the gradingring was given compared with different arrangement forms and different design.