In accordance with the insulator material, there are porcelain, glass and composite insulators at present.
依绝缘子的材料分，目前有瓷、玻璃和有机复合绝缘子。
The record material is insulator material with smooth surface, which can produce etched latent trace when irradiated by incident ions.
记录材料为入射离子在其中能产生可蚀刻潜径迹的表面平整光洁的绝缘材料。
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