contact lead

例句：

1. 1. The contact lead connects the two wires together.
   接触线将两根电线连接在一起。
2. 2. The engineer used a special tool to remove the old contact lead.
   工程师使用特殊工具来移除旧的接触线。
3. 3. The new contact lead has a longer lifespan than the old one.
   新的接触线比旧的有更长的使用寿命。