tank rim

例句：

1. 1.The tank rim was covered in rust and had to be replaced.
   坦克边缘被锈蚀覆盖，不得不更换。
2. 2. The tank rim was a critical part of the armored vehicle's design.
   坦克边缘是装甲车设计中的关键部分。
3. 3.The tank rim was designed to provide additional protection for the crew.
   坦克边缘被设计为为乘员提供额外的保护。