sector-type lock gate

例句：

1. 1.The new sector-type lock gate is more secure than the old one.
   新的扇形锁门比旧的更安全。
2. 2.The construction workers used a sector-type lock gate to secure the area.
   建筑工人使用扇形锁门来保护这个区域。
3. 3.The security guard installed a sector-type lock gate at the entrance of the building.
   保安在大楼入口处安装了扇形锁门。