闸皮

例句：

1. 1. The bridge has a large water gate at the entrance.
   这座桥在入口处有一个大的水闸。
2. 2. The train stopped at the hydraulic gate.
   火车停在了液压门处。
3. 3. The engineer checked the gates before starting the project.
   工程师在开始这个项目之前检查了所有的闸门。