long rod insulator

例句：

1. 1. The long rod insulator is used to protect the cable from damage during transportation.
   长杆绝缘体用于在运输过程中保护电缆免受损坏。
2. 2. The insulator is designed to withstand high voltage and prevent electrical short circuits.
   绝缘体设计用来承受高电压，防止电气短路。
3. 3. The insulator is crucial for maintaining the integrity of the electrical system.
   绝缘体对于维护电力系统的完整性至关重要。