rigid insulator

例句：

1. 1. The new insulator is much more effective than the old one.
   新的绝缘体比旧的更有效。
2. 2. The engineer used a rigid insulator to prevent the wire from moving.
   工程师使用一个硬绝缘体来防止电线移动。
3. 3. Rigid insulators are often used in high-voltage electrical systems to protect against overheating.
   硬绝缘体常用于高压电气系统中，以保护免受过热。