1. ageing of insulating material 
   绝缘材料老化
2. cryogenic temperature insulating material 
   耐低温绝缘材料
3. high frequency insulating ceramics 
   高频绝缘陶瓷
4. high-temperature endurable insulating material 
   耐高温绝缘材料
5. dielectric properties test of insulating material 
   绝缘材料介电性能测试

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• 1. 低压绝缘手套
  low tension electrical porcelain 低压电瓷...low tension insulating gloves 低压绝缘手套...low tension line pin-type insulator 低压线路针式绝缘子
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