polar ring

The crosslink structure reduced , and the modification of rubber by polar sulfur ring was predominant resulting in plastics-like SBR ebonite at the middle and final stages of vulcanization ;

在硫化反应中后期，胶料中交联结构减少，极性的硫环分子对橡胶改性起主导作用，从而形成具有塑料性质的硬质SBR；

This review paper introduces interesting issues in the shuo of interacting galaxies , including mergers of galaxies , shell structure of galaxies , SO polar rings and ring galaxies .

本文综述了这个领域的研究状况，着重对星系的合并、星系的壳结构、SO星系极环和环状星系作了介绍。

But it 's exactly what is required for polar bears , ring seals , and the snowy-white beluga whales & the highly vocal canaries of the sea .

而那正是北极熊、环纹海豹和海洋高音金丝雀&雪白的白鲸所需求的。

Non-axisymmetric Buckling of Polar Orthotropic Annular Plates Ring Shaped Oscillator

极正交各向异性环形板的非轴对称屈曲